EAON - INFO N° 46

2004, JANUARY  to  MARCH

 

199 observations (31 possibly positive) have been performed between January and March, about of 52 events (11 possibly positive)  by  120 observers, from the 17 following countries (and numbers of observers) :

AT = Austria (4), BE = Belgium (7), BG = Bulgaria (3), BY = Belarus (2), CH = Switzerland (2),
CZ = Czech Republic (4), DE = Germany (16), ES = Spain (5), FR = France (35), HU = Hungary (1), IT = Italy (11),
NL = The Netherlands (7), PL = Poland (2), PT = Portugal (1), RU = Russia (2), UA = Ukraine (1),
UK = United Kingdom (17).

SPS who observed from IT and CH has been counted as a Swiss observer. You will find in the table hereafter the list of the observers abbreviations in alphabetical order, with the number of observations made by each of them.

 

amg

ARMAGH  Observatory

Obs. : Apostolos  CHRISTOU (ACH),

Amir AHMAD, Ignacio UGARTE,

John  Mac FARLAND, David ASHER

3

UK

 

HMG

Hazel  Mac GEE

4

UK

 

HRB

Herbert  RAAB

2

AT

 

HRU

Harrie G. J.  RUTTEN

1

NL

 

HSC

Chris  HILLS

2

UK

AZO

Tibor  AZTALOS

1

HU

 

IBL

Ingeborg  BLOMMERS

1

NL

bao

Belogradchik Astronomical Obs.

1

BG

 

IMV

Ivan  MHITAROV

with  Vlad  ONOPRIENKO  (OPI)

1

RU

Observers : JELEV, PESSEV, KURTEV

 

BAO

Stefano  BASSO

1

IT

 

JGS

Malcolm  JENNINGS

3

UK

BCL

Philippe  BERNASCOLLE

2

FR

 

JHP

Jon  HARPER

5

UK

BDR

Eberhard  BREDNER

1

DE

 

JII

Christian  JASINSKI

1

FR

BFF

Pietro  BARUFFETTI

1

IT

 

JLX

Jean  LECACHEUX

3

FR

BGS

Jean  BOURGEOIS

1

BE

 

JNK

Tomas  JANIK

7

CZ

BKN

Bernd  BRINKMANN

1

DE

 

JQT

Pierre  JONQUET

1

FR

BLM

Lex  BLOMMERS

1

NL

 

JSA

Jiri  SRBA

1

CZ

BOL

Simone  BOLZONI
with  Chiara  RIEDO

19

IT

 

JVA

Jean  VILAR

1

FR

1

 

JVB

Jeremie  VAUBAILLON

with  Jonatan NORMAND and  Julien LECUBIN

1

FR

BTG

Rene  BOURTEMBOURG

2

BE

 

BTH

Jerome  BERTHIER

1

FR

 

KBY

Geoff  KIRBY

1

UK

with Frederic  VACHIER (FVC)

 

KHL

Mike  KOHL

1

DE

BUL

Henk  BULDER

2

NL

 

LBA

Laurent  BERNASCONI

with  Pierre  ANTONINI (ATI)

1

FR

CAS

Ricard  CASAS

1

ES

 

CHR

Bernard  CHRISTOPHE

with Jean-Marie  VUGNON (JVG)

1

FR

 

LEI

Frank  LEITER

2

DE

 

LPG

Lionel PARMEGIANNI

1

FR

CKE

Michael  CLARKE

1

UK

 

LPP

Lido  PROSPERI

1

IT

CNS

Oscar  CANALES MORENO

6

ES

 

MAA

Andrea  MANNA

2

CH

COF

Francois  COLAS

1

FR

 

MBU

Michel  BOUTET

1

FR

CRB

Massimo   CORBISIERO

1

IT

 

MID

Thierry  MIDAVAINE

with O. DECHAMBRE and D. NGUYEN

1

FR

DEF

Fabrice  DELABROSSE

1

FR

 

DGE

Patrick  DEGRELLE

4

FR

 

MLS

Richard  MILES

7

UK

DGG

Gerhard  DANGL

1

AT

 

MRX

Harald  MARX

1

DE

DKC

Monique  De KOCK

1

NL

 

NBL

Wim  NOBEL

1

NL

DLR

Roberto  DI LUCA

with Carlo  FRISONI (FRI)

1

IT

 

NND

Dominique  NAILLON

1

FR

1

 

NNE

Claude  NINET

1

FR

DNZ

Helmut  DENZAU

1

DE

 

NVI

Vitali  NEVSKI

6

BY

DPY

Michel  DUPOUY

1

FR

 

OKE

Oliver  KLOES

with  Stefan  MESSER (MSS)

1

DE

DSS

Raymond  DUSSER

1

FR

 

4

ELL

Andrew  ELLIOTT

3

UK

 

OTA

Otta  SANDOR

2

CZ

FAR

Otto  FARAGO

1

DE

 

PAH

Hilari  PALLARES  ALBALAT

2

ES

FRP

Eric  FRAPPA

with  Maylis  LAVAYSSIERE (LVY)

1

FR

 

PAR

Michael  PARL

5

DE

 

PAW

Thierry  PAUWELS

with P. VINGERHOETS (VIG) and P.  De CAT

1

BE

GBL

Alfons  GABEL

1

DE

 

GCV

Rui  GONCALVES

1

PT

 

PSY

Raymond  PONCY

1

FR

GMI

Gianluca   MASI

1

IT

 

PUI

Bruno  PULCINELLI

1

IT

HCP

Claus Peter  HEIDMANN

2

DE

 

PUM

Michel  PUJOL

1

FR

(cont.)

RGD

Jean  RIGAUDIN

1

FR

 

STH

Adam  STEPHENS

1

UK

with  Christian  SAUZEAUD (SZU)

 

STP

Roger  STAPLETON

2

UK

ROY

Rene  ROY

1

FR

 

STV

Jeff  STEVENS

1

UK

SBL

Saul  BLANCO  LANZA

2

ES

 

SUP

Sergey E. SHURPAKOV

4

BY

SCB

Carles  SCHNABEL

2

ES

 

THO

Bertrand  THOORIS

4

BE

SCE

Ladislav  SMELCER

1

CZ

 

TPT

Terry  PLATT

1

UK

SHI

Michael  SCHMID

with Hans  JASICEK (HJI)

1

AT

 

TPY

Thomas  PAYER

1

DE

1

 

trt

TAROT (see below)

9

FR

SKC

Boris   SKORITCHENKO

1

UA

 

UTF

Ugo  TAGLIAFERRI

1

IT

SLO

Wieslaw  SLOTWINSKI

1

PL

 

VAI

Franck  VAISSIERE

With Jeremie  VAISSIERE

1

FR

SMI

Michael  SCHMIDT

1

DE

 

SPL

Jerzy  SPEIL

1

PL

 

WKL

Jan  Maarten  WINKEL

1

NL

SPS

Stefano  SPOSETTI

3

CH

 

WLL

Herman  WILLAERT

1

BE

1

IT

 

WSG

Wolfgang  STRICKLING

1

DE

SPU

Klaus  SPRUCK

2

DE

 

 

 

 

 

 

TAROT (Acronym for “Télescope à Action Rapide pour les Objets Transitoires”) is an automatic telescope, located at Calern Observatory, dedicated to g-rays bursts optical study; when available, it can be used for various survey programs.

 

 

2004 (January to March) Observations

 

Observations are usually visual and negative, excepted when otherwise specified. All times are in UTC.

 

2004/01/05 : (34) Circe  / TYC 0745-01060-1                                        JNK

2004/01/10 : (447) Valentine / TYC 1888-00539-1                                JHP        PAR       STP

PAR : videorecording; STP : CCD drift scan. JHP was in the updated predicted path but his survey has been disturbed by clouds.

2004/01/11 : (55565) 2002 AW 197 / TYC 0812-01640-1                          CKE       CNS       HSC

                                                                                                                IMV  (with OPI)       MLS       PAR       trt

2002 AW 197 is a Kuiper Belt Object. PAR : videorecording; observation disturbed by clouds. MLS : two telescopes with CCD imaging.

2004/01/15 : (447) Valentine / TYC 1887-00708-1                                JGS

JGS : videorecording

2004/01/20 : (34) Circe  / TYC 0744-00108-1                                        BOL

2004/01/25 : (361) Bononia /  TYC 6763-01551-1                                 COF       HMG      JLX

and two positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

BCL

43 24 38 N

05 52 29 E

+275 m

04:53:17.5  ± 0.6 s

04:53:23.7  ± 0.3 s

6.2 ± 0.6 s

PSY

43 38 49 N

03 56 29 E

+45m

04:53:13.0  ± 0.5 s

04:53:14.8  ± 0.5 s

1.8 ± 0.2 s

COF : CCD imaging; PSY : CCD drift-scan; short trail interruption at 04:53:19.9 but rather due to bad seeing conditions.

(361) Bononia was involved in an event on 2002/01/31 (cf. Info 37) and is supposed to be a double asteroid. The uncertainty in PSY computer internal time (±0.5 s ) does not allow to settle the question of duplicity : if he was fast, the chords are coherent with a single body 144 km in diameter. If he was late, two bodies are necessary. If he was right, Bononia should be double or a single elongated body ~200 ´ ~100 km.

These observations are in good agreement with J.  MANEK's update, as the real path was shifted 0.5 path width toward south.

 

2004/01/29 : (308) Polyxo / HIP 27972                     AZO       BAO      BOL       DGE       FRP (with LVY)                                                                              JHP        SPS     STP        STV        THO

and three positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

JSA

49 20 41.1 N

17 59 52.0 E

+389 m

23:06:33.2  ± 0.25 s

23:06:51.45 ± 0.25 s

18.25 ± 0.5 s

SPL

50 50 33.1 N

16 17 36.9 E

+401 m

23:07:04.1 ± 0.2 s

23:07:23.4 ± 0.2 s

19.3 ± 0.3 s

SCE

49 28 ??   N

17 58 ??  E

?

-

-

5 to 10 s.

SPS: CCD imaging;  JSA, SCE, STP : CCD drift scan; FRP : videorecording

These observations are in perfect agreement with J. MANEK's and S. PRESTON’s  updates, as JSA and SPL were nearly on the central line of the shadow path (max duration : 22.7 s)

and STP was just outside it, at its southern border. The two exploitable chords can be fitted  with a 110 ´ 150 km elliptic profile, consistent the mean diameter used for calculations,

about 150 km.

 

2004/02/08 : (119) Althaea / TYC 0810-02126-1                    DLR (with C. FRISONI)           MAA

DLR : videorecording

2004/02/11 : (241) Germania /  HIP 50299                             BOL       CAS

BOL :  was in the predicted path but reported clouds at the critical moment. CAS : CCD drift scan

 

2004/02/14 : (91322) 2001XR254 / TYC 1343-00785-1                        BOL       CNS       HMG      SPS

Event involving a Trans Neptunian Object. SPS : CCD drift-scan

2004/02/16 : (121) Hermione / TYC 1905-00864-1                               BCL       BFF        BOL

                        BTH (with FVC)      DPY       DSS        FAR       GBL       GMI       HCP       JII           JNK          JQT                        JVA        JVB (with J. NORMAND and  J. LECUBIN)                   LBA (with ATI)       LPP        MAA        NNE                        OKE (with MSS)      PAR       PUI        PUM      RGD (with SZU) ROY      SMI        SPS           UTF                        VAI (with  J. VAISSIERE)

and four positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

CRB

40 50 48.2 N

14 12 07.6 E

+110 m

22:29:27.16 ± ? s

22:29:29.60    ± ? s

2.44 ± ? s

CNS

42 35 44.2 N

00 43 54.0 W

+650 m

22:32:37.55 ± 0.3 s

22:33:02.2   ± 0.1 s

24.65 ± 0.1 s

DEF

43 29 49.7 N

01 05 42.4 W

+80 m

22:32:57.1 ± 0.1 s

22:33:05. 8 ± 0.1 s

8.7 ± 0.15 s

SBL

42 34 34.8 N

05 33 53.4 W

+828 m

22:33:58.0 ± ? s

22:34:08.0 ± ? s

10 ± 1 s

FAR, HCP, OKE, PAR, PUI: video recording;  DPY, JII, LBA, NNE, PUM, RGD, ROY, SPS, VAI : CCD drift scan;
GMI, JVA
: CCD imaging

 

W.J. MERLINE et al. discovered the tiny (17 km in diameter) satellite "S/2002 (121) 1" of 121 HERMIONE  at Keck Observatory in 2002 September (cf. IAUC 7980).

Satellite was predicted to follow a track :  148 ± 115 km North from J. MANEK's or S. PRESTON's centreline of main body.

Bad weather prevented observations all along the predicted satellite track.

BFF : blink at 22:31:07; DSS, NNE : due to clouds, survey not including predicted time of occultation by satellite.

GMI : two magnitude drops were recorded at 22:31:14 and 22:31:49; as the main event should have occurred at about 22:29:35 and the satellite event at about 22:30:40, these drops (too small for an occultation, anyway) must be due to turbulence.

Positive observations involve the main body and show that all the system was shifted about 0.3 path width (60 km) toward south. Chords can be fitted with an elliptical profile (145 ´ 175 km) and show that Hermione is smaller than supposed (mean diameter used for the predictions ranging from 180 to 230 km).

 

2004/02/18 : (284) Amalia / TYC 0782-00761-1                     BUL       WKL

and five positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

JHP

  54 16 30.13 N

 00 41 13.15 W

+75 m

23:14:39.6  ± 0.1 s

23:14:43.3  ± 0.1 s

3.7 ± 0.15 s

BLM

  52 09 20.45 N

  04 29 06.58 E

+20 m

23:14:05.8 ± 0.5 s

23:14:11.6 ± 0.5 s

5.8 ± 0.7 s

LEI

  50 32 53  N

  08 30 02 E

+167 m

23:13:34.3 ± 0.1 s

23:13:39.2 ± 0.1 s

4.9  ± 0.15 s

OKE, MSS

  50 08 17.4  N

  08 21 50.4  E

+256 m

23:13:32.3 ± 0.1 s

23:13:34.9 ± 0.1 s

2.6 ± 0.15 s

SPU

  50 32 04  N

  08 35 31 E

+240 m

23:13:33.52 ± 0.05 s    

23:13:38.78 ± 0.05 s      

5.25 ± 0.1 s

OKE, MSS : videorecording. 
WKL negative observation, positive ones and measured durations reveal a slight shift of the path (0.4 path width, toward north); the chords can be fitted with an elliptical 
profile 38 ´ 70 km. JHP timing results must be corrected by about -7 s to fit other results.
 

2004/02/20 : (349) Dembowska / HIP 53965                          DKC      JNK        MRX      THO

and one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

SKC

50 35 17.3 N

29 55 14.2 E

+146 m

21:31:44.3 ± ? s

21: 31: 45.0  ± ? s

0.7 ± ? s

THO  : videorecording

SKC was situated far from the predicted path so he perhaps observed a tiny 10 km – satellite, searched 12 days after 

by B. MERLINE et al. at VLT telescope without result.
 

 

2004/02/25 : (2019) van Albada / TYC 1338-00883-1u         BOL       DGE       DGG      ELL        HCP                  HMG      HSC       JGS        JNK        MLS       PAR       SHI        STH        THO       TPT

Event published on Euraster web-site www.euraster.net and updated by J. MANEK.

ELL, HCP, JGS, PAR, SHI, THO : videorecording;  MLS : two telescopes with CCD imaging.

HCP, JGS,  PAR were in the predicted path, HMG and THO very close to it; HCP and PAR have been disturbed by clouds. The lack of positive observation lets the real path position unknown, but it has been significantly shifted.

 

2004/03/04 : (408) Fama / TYC 0809-00875-1                                      SHI (with Hans JASICEK)  

SHI : videorecording. T. HAYAMIZU from the JOIN (Japanese Occultation Information Network) sent a negative report.

 

2004/03/08 : (554) Peraga / TYC 0829-00848-1                                    BOL       GCV      JLX        JNK

GCV : videorecording; as he was in the J. MANEK’s predicted path, there must have been a significant shift.

JNK : blink at 21:11:07.49 ±  0.3 s with estimated duration between 0.5-1.0 s. JNK was far (about 16 path widths north) from the predicted path and event occurred almost two minutes before predicted appulse. So he perhaps observed a possible 5-10 km satellite, its distance from asteroid, projected on Earth surface, being almost 2000 km.

 

2004/03/20 : (545) Messalina /  TYC 4933-00970-1                              bao         KHL       PAH       SBL

and one  positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

DLR

44 54 10.2 N

10 50 40.7 E

+19 m

21:56:56.28 ± 0.12 s

21:57:02.68 ± 0.12 s

  6.4 ± 0.24 s

bao : photometer; PAH, DLR,: videorecording.

DLR reported four negative observations from stations near Bologna (obs. : C. FRISONI (FRI), A.DALLE DONNE (DDN) , R. NORELLI (NRL), E. PIERANTONI (PRT), D. DALL'OCCO, P. GARCIA). This is surprising since all of them were in the predicted shadow path and prediction was nearly exact ; DLR’s event measured duration is close to the expected value for a station at this location, near the central line of the track (maximal duration : 7.7 s).

 

2004/03/23 : (566) Stereoskopia / TYC 4970-01009-1                          ELL        JNK

and eight  positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

LPG

  49 08 16.5 N

  01 39 53.5 E

+43 m

02:46:46.25 ± 0.05 s

02:46:57.83 ± 0.05 s

11.58 ± 0.05 s

CHR

  49 21 04  N

  02 07 22  E

+105m

02:46:44.78 ± 0.02 s

02:46:56.50 ± 0.02 s

11.72 ± 0.04 s

MID

  49 21 04  N

  02 07 22  E

+105m

02 46 44.85 ± 0.06 s

02:46:56.5  ± 0.06 s

11.65 ± 0.05 s

JLX

  49 38 23.5 N 

  02 07 56.1 E

+165 m   

02:46:46.75 ± 0.15 s  

02:46:57.60  ± 0.15 s  

10.85 ± 0.2 s

NND

  49 49 34  N

  02 46 10  E

+105 m  

02:46:45 ± 1 s

02:46:52   ±1 s

7 ± 1.5 s

KBY

  50 37 20.3 N

  02 27 08.7 W

+12 m

02:47:13.9 ± 0.2 s

02:47:23.45 ± 0.2 s

9.55  ± 0.3

HMG

  51 15 57.12 N

  00 30 27.72  W

+57m

02:47:04 ± 1 s   

02:47:11.3 ± 0.1

7 ± 1 s

amg

  54 21 11  N

  06 38 59  W

+69m

02:47:44.6  ± 0.5 s

02:47:53.4   ± 0.5 s

8.8 ± 0.7 s

amg observers : A. CHRISTOU (ACH) and D. ASHER; CHR : CCD drift scan, was with J.M. VUGNON (JVG);

MID : videorecording, was with O. DECHAMBRE (ODC) and D. NGUYEN;

ELL: videorecording, should observed an event as he was in the shadow path,  but missed the appulse time by a few seconds.

HMG : a probable error with the stopwatch caused a 2.4 s duration to be reported originally. Reconstruction of oral notes shows this to be unrealistic, and that the time was more

likely 7 ± 1 s.

JLX : transient dimming at 02:45:30-32.5  ± 1 s.

LPG : 0.9 s time shift must be introduced to get agreement with others observers.

Chords can be fitted with a 122 ´ 158 km elliptic profile, the long axis lying at an angle of 33° relative to the asteroid motion.

Predicted path by J. MANEK was nearly exact (less than 5 km shift).

 

2004.03.23 : (1024) Hale / HIP 72388        BDR       BKN      BTG       BUL       DGE       DNZ       ELL          HRU                                       IBL        LEI MLS       NBL       OKE (with MSS)

                                       PAW (with P. VINGERHOETS and P. De CAT)          SLO       THO       WLL      WSG

and three  positive or perhaps positive:

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

amg

   54 21 11 N

   06 38 59 W

+69m

22:06:27.5 ± 0.1 s

22:06:34.4 ± 0.1 s

6.9 ± 0.15 s

TPY

   51 23 41 N

   06 58 46  E

+120 m

23:05:48.3  ± 0.1 s

23:05:53.4  ± 0.1 s

5.1 ± 0.15 s

SPU

   50 40 18 N    

   08 44 09  E

+250 m

23:05:50 ± 1 s

23:05:51 ± 1 s

Less than 1 s

Event predicted by S. PRESTON on his web-site  http://www.asteroidoccultation.com, updated by himself and J. MANEK.

BDR, DNZ, OKE, THO, ELL, WSG : videorecording; MLS, PAW, TPY : CCD imaging; BKN : photographic method

amg : survey disturbed by clouds; observers : Apostolos CHRISTOU (ACH), Ignacio UGARTE and Amir  AHMAD,  gradual D and R given in the table; John Mac FARLAND, 2” south, 3”east from others observers and 61 meters above sea level : perhaps a positive observation, no timing done.

HRU : was in the shadow path but stopped his survey a few seconds too early;  SLO : survey interrupted by clouds shortly before closest approach; SPU : many clouds.

SPU, TPY positive observations and BKN, LEI negative ones (“shepherd” observers) are in agreement with a 40 km body; as TPY registered a duration close to the max value (4.5 s), the

path must have been shifted 0.6 path width toward north.

amg  observations must be spurious (as not confirmed by an important set of observers dispatched in the Netherlands and northern Germany).

 

Other observations  (not in E.A.O.N.  program) :

 

2004/01/01 : (1596) Itzigsohn  /TYC 1255-00023-1u                            PAH

Event published by Mike KRETLOW (KRT) on his web-site http://astro1.physik.uni-siegen.de/uastro/occult/pred2004/stino/gif/

2004/01/09 : (290) Bruna / TYC 4067-00190                                        SCB       trt

Event published by FRP on the web-site www.euraster.net

2004/01/09 : (983) Gunila / TYC 0766-01034-1                                     CNS       SCB

Event predicted by Steve PRESTON (PST). CNS was in the predicted path but his survey has been interrupted by clouds before the closest approach. SCB : videorecording

2004/01/10 : (272) Antonia / TYC 0279-01058-1                                  trt 

Euraster event

2004/01/17 : (2104) Toronto / TYC2 1192-01397-1                              BOL (with Chiara RIEDO)        OKE

Event published by KRT; OKE: videorecording

2004/01/23 : (16394)  1981 QD 4 / TYC 2447-00551-1                         NVI        SUP

Event published on Vitali NEVSKI (NVI) web-site www.nevski.nm.ru/Rus/info/occultinf_eng.html

2004/01/24 : (32505) 2001 KF 17 / TYC 5481-00826-1                         NVI        SUP

Event published on NVI web-site

2004/01/24 : (413) Edburga  /  HIP 35659                                             NVI

Event published on NVI and KRT web-sites and updated by PST

2004 01 25 : (443) Photographica / TYC 0664-00973-1                       BTG       JHP

Event published on NVI and KRT web-sites and updated by PST

2004/01/30 : (1359) Prieska / TYC 2475-00991-1                                 CNS       MBU      trt

Event predicted by PST

2004/01/30 : (1051) Merope / 2UCAC 29653183                                  BOL       trt

Euraster event

2004/01/30 :  (828) Lindemannia   / 2UCAC 39840122        

Only one  positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

NVI

55 03 34  N

  30 19 47  E

+180 m

20:17:39.3  ± 0.1 s

20:17:40.25 ± 0.1 s

0.95 ± 0.15 s

Event published on NVI web-site and updated by PST

2004/01/30 : (4722) Agelaos / TYC 2436-00556-1                                 BOL       HRB       trt

Event predicted by KRT and FRP; HRB : videorecording

2004/01/30 : (11554) Asios / TYC 1348-01439-1                                   NVI

Event predicted by KRT and NVI

2004/01/30 : 2003AZ84 / 2UCAC 36806754                                         SPS

Euraster event involving a Trans Neptunian Object; SPS : CCD imaging

2004/02/08 : (1329) Eliane / TYC 0742-00096-1                                   trt

Event predicted by KRT and FRP

2004/02/10 : (1664) Felix /  TYC 2474-00967-1                                     BOL

Event published on NVI web-site and updated by PST. Two negative reports have been received  from the JOIN.

2004/02/13 : (2413) van de Hulst / TYC 0769-00529-1                         BOL       trt

Event predicted by KRT and FRP

2004/02/14 : (4521) Akimov / TYC  0625-00620-2                                BOL       SUP

Event published on NVI web-site

2004/02/15 : (6472) Rosema / TYC 0805-01280-1                                 SUP

Event published on NVI web-site

2004/02/23 : (5979) 1992XF / TYC 1335-01087-1u                                             DGE       JGS

Event published on  NVI web-site;  JGS : videorecording

DGE was in the predicted shadow path but uncertainty was great for this small asteroid (diameter about 13 km). 

2004/02/25 : (4959) Niinoama / HIP 15633                                            BOL       NVI

Event published on  NVI web-site

2004/02/27 : (946) Poesia / 2UCAC 33399714                                       BOL

2004/02/29 : (1262) Sniadeckia /  TYC 0037-00948-l                            MLS

Event published on  NVI and SMI web-site  http://www.uni-mainz.de/~michschm/Ast2004. 
MLS : two telescopes, CCD imaging

2004/03/02 : (3118) Claytonsmith / 2UCAC 38965910                         BOL       trt

Event published on Euraster and SMI web-sites.

2004/03/03 : (98) Ianthe / 2UCAC 45793162                                        BOL       CNS

2004/03/10 : (1458) Mineura / HIP 59872                                              BGS       BOL

Event predicted by PST; BGS : videorecording

2004/03/12 : (340) Eduarda /  HIP 69981                                              HRB       PAR

Event predicted by PST; HRB, PAR : videorecording

2004/03/17 : (1765) Wrubel / 2UCAC 44834247

Only one  positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

BOL

45 36 18 N

08 51 07 E

+230 m

03:28:42.0 ± 0.5 s

03:28:43.5 ± 0.5 s

1.5 ± 0.5 s

BOL : uncertain observation due to bad seeing and star faintness. Event occurred at the predicted time but BOL was at about 1.5 path width from the shadow path limit, so no conclusion can be drawn.

2004/03/19 : (250) Bettina / 2UCAC 41661504

Only one  positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

JHP

54 16 30.13 N

00 41 13.15 W

+75 m

21:17:34.05  ± 0.15 s

21:17:35.8 ± 0.15 s

1.75 ± 0.2 s

Event published on SMI web-site;  JHP : clear disappearance of target star, the others in the field remaining visible. Many interruptions due to clouds. JHP was in the predicted track, but event occurred about 54 s after the predicted time.

2004/03/21 : (201) Penelope / TYC 1366-00907-1                  JNK        OTA

Event predicted by KRT ; OTA : videorecording. This event has not been found with actuated orbital elements (03/2004 ASTORB data)

2004/03/29 : (894) Erda / TYC 0752-01112-1                        BOL       JNK        OKE (with MSS)

Event predicted by KRT and  SMI; OKE : videorecording; JNK : survey interrupted shortly after the predicted appulse time.

2004/03/31 : (2165) Young / HIP 65642                                  OTA

Videorecording.

 

 

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Received reports and results are summarized on www.euraster.net, a web site maintained by E. FRAPPA from
Saint-Etienne Observatory.

 

Please send the reports quickly, about positive as well as negative observations !

It is necessary to send a report even if there has been no occultation for your place (negative observation). These negative observations can sometimes be of as great interest as positive ones : they can be decisive to determine the shape and size of main body if we do have positive (“shepherd observations”), they limit the location of main body (when we don't have a positive), and sweeps the nearby space around main body for possible satellites!

There is no need to send a report if the weather or technical conditions have prevented the event observation.

 

Please DON’T FORGET to use the IAU format for the date, YYMMDD.

 

 

G. REGHEERE gillesregheere@yahoo.fr

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