EAON - INFO N° 47

2004, APRIL  to  AUGUST

 

157 observations have been performed between 2004, April and August, (17 positive or possibly positive) about 47 events (12 possibly positive) by 95 observers, from the 16 following

countries (and numbers of observers) :

AT = Austria (3), BE = Belgium (4), BY = Belarus (2), CH = Switzerland (1), CZ = Czech Republic (5),
DE = Germany (13), ES = Spain (17), FR = France (28), GR = Greece (1), IT = Italy (3), NL = The Netherlands (1),
NO = Norway (1), PL = Poland (3), PT = Portugal (1), RU = Russia (3), UK = United Kingdom (9).

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.

 

AGH

Anton  GOROHOV

1

RU

 

JGS

Malcolm  JENNINGS

3

UK

ala

Asociación Leonesa de Astronomía  

2

ES

 

JHP

Jon  HARPER

1

UK

amg

Armagh Observatory

Obs. : Mark BAILEY, Sharon  McCLURE, Jonathan McAULIFFE, Ciara QUINN

1

UK

 

JIR

Josef   JIRA

1

CZ

 

JLX

Jean  LECACHEUX

with  Francois  COLAS (COF)

5

FR

 

1

BCL

Philippe  BERNASCOLLE

4

FR

 

JNK

Tomas  JANIK

6

CZ

BEI

Wolfgang  BEISKER

1

DE

 

JSZ

Jacques  SANCHEZ

1

FR

BGS

Jean  BOURGEOIS

1

BE

 

JVA

Jean  VILAR

1

FR

BLM

Lex  BLOMMERS

1

NL

 

KFT

Alexander KRAFFT

1

DE

BNN

Roland  BONINSEGNA

1

BE

 

KHL

Michael  KOHL

1

CH

BOL

Simone  BOLZONI

8

IT

 

LAB

Carlos  LABORDENA

2

ES

BTG

René  BOURTEMBOURG

1

BE

 

LBA

Laurent  BERNASCONI

1

FR

CBA

Christian  BARRET

1

FR

 

LEI

Frank  LEITER

1

DE

CHR

Bernard  CHRISTOPHE

with Thierry  MIDAVAINE (MID)

1

FR

 

LVY

Maylis  LAVAYSSIERE

2

FR

2

 

MBU

Michel  BOUTET

1

FR

CNS

Oscar  CANALES MORENO

3

ES

 

MDT

Oernulf  MIDTSKOGEN

1

ES

CPE

Emili  CAPELLA

1

ES

 

MKM

Pavel  MAKSYM

1

PL

CQU

Jean  CAQUEL

with Gerard  VAUDESCAL (VDC)

1

FR

 

MNK

Jan  MANEK

1

CZ

 

MRX

Harald  MARX

2

DE

CTM

Martine  CASTETS

1

FR

 

NIT

Benoit  NOIRET

1

FR

DEN

Martin  DENTEL

1

DE

 

NVI

Vitali  NEVSKI

5

BY

DGE

Patrick  DEGRELLE

4

FR

 

OKE

Oliver  KLOES

4

DE

DGG

Gerhard  DANGL

2

AT

 

OTA

Otta  SANDOR

2

CZ

DLR

Roberto  DI LUCA

1

IT

 

PAH

Hilari  PALLARES  ALBALAT

with  Ricard  CASAS (CAS)

3

ES

ELL

Andrew  ELLIOTT

1

UK

 

1

EMA

Eduard  MASANA  FRESNO

1

ES

 

PAR

Michael  PARL

11

DE

ESE

Emilian  SKRZYNECKI

2

PL

 

PBV

Pavel  BAHTINOV

1

RU

FAR

Otto  FARAGO

1

DE

 

pdm

Pic du Midi Observatory

Obs. :  Valerie DESNOUX, Christian BUIL,

Robert DELMAS, Andre RONDI

1

FR

FBI

Frederic  BRION

1

FR

 

FIM

Marcin  FILIPEK

1

PL

 

FMY

Francois  MEYER

2

FR

 

PSY

Raymond  PONCY

1

FR

FNZ

David  FERNANDEZ  BARBA

1

ES

 

PUM

Michel  PUJOL

3

FR

FOC

Mario  FERNANDEZ  OCANA

1

ES

 

ROY

Rene  ROY

1

FR

FRP

Eric  FRAPPA

3

FR

 

RTH

Wolfgang  ROTHE

2

DE

FVE

Francesc  VILARDELL

1

ES

 

RVA

Joan  ROVIRA

1

ES

GBH

Bjorn  GRANSLO

1

NO

 

SCB

Carles  SCHNABEL

3

ES

GCV

Rui  GONCALVES

1

PT

 

SEN

Mathieu  SENEGAS

1

FR

GHD

Siegfried  GEBHARD

1

DE

 

SHB

Brendan  SHAW

1

UK

HAL

Karel  HALIR

1

CZ

 

SHI

Michael  SCHMID

2

AT

HCP

Claus Peter  HEIDMANN

with  Klaus  NAGEL (NGK)

  and Michael PARL (PAR)

1

DE

 

SKJ

John  SEIRADAKIS

1

GR

1

 

SUP

Sergey E. SHURPAKOV

1

BY

 

THO

Bertrand  THOORIS

1

BE

HMG

Hazel  Mc GEE

3

UK

 

TOM

Lluis  TOMAS

with  Xavier  MASRAMON

1

ES

HRB

Herbert  RAAB

2

AT

 

IVY

Igor V. VINYAMINOV

1

RU

 

trt

TAROT (see below)

2

FR


 

(cont.)

UTF

Ugo  TAGLIAFERRI

4

IT

 

WSW

Werner  SCHWARZ

1

DE

VAI

Franck  VAISSIERE

1

FR

 

XBS

Xavier  BROS

1

ES

VSP

Valenti  SALLARES

1

ES

 

 

 

 

 

 

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 (April to August) Observations

 

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

 

 

2004/04/08 : (903) Nealley  /TYC 5025-00279-1                     BOL       DEN       RTH

RTH : videorecording. As DEN and RTH were situated near the northern border of the predicted path  (respectively just outside and inside it), the real path must have been shifted

toward south.

 

2004/04/11 : (17) Thetis  /TYC 6269-02270-1                         BOL

 

2004/04/22 : (164) Eva  / TYC 5045-00218-1                         BOL       DLR       GHD      HCP       HMG                                                                                         OKE       PAR       SHI

and 6 positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

BEI

48 11 14.4 N

11 34 26.4 E

+521m

Blink at 03 00 34.32 ± 0.05 s

Less than 0.05 s

FAR

48 46 57.1 N

09 11 47.2 E

+406m

03:00:29.46  ± 0.04 s

03:00:36.96 ± 0.04 s

7.50 ±0.04  s

JIR

49 45 07.4 N 

13 36 15.6 E

+400 m

03:00:04.85 ± ? s

03:00:14.33 ± ? s

9.48 ± ? s

KHL

   47 16 18   N

08 56 29.5 E

+719m

Blink at 02:59:47.8 ± ? s

Less than one sec.

MNK

   50 01 55   N

14 22 18 E

+540 m

mid event at about 3:00:06

4  to 5 s

WSW

48 43 35.5 N

09 08 27.0 E

+425 m

-

-

6.9 ±0.3 s

GHD : videorecording,  observation was only partial due to clouds and dawn; BEI, FAR, HCP, MNK, OKE, PAR : videorecording.

HCP was in the predicted shadow path, near its southern border, MNK was situated 16km north of his predicted northern limit : there has been a slight shift (0.2 path width) of the shadow path toward north, relative to the prediction.

An unrealistic -18 s correction must be applied to BEI timing, to fit with the other mid-events. More probably, BEI blink is not a real event, as it is not confirmed by HCP, PAR and SHI, situated nearly on same chord, and even if HCP and PAR reported they could have miss “a 0.2 to 1 s duration event”. The other positive observations (except KHL’s one, see here after) can be fitted with a 129 ´ 82 km elliptic profile, with long axis parallel to asteroid motion, what is consistent with the 110 km mean value used for calculations. OKE missed the northern limb by 15 km.

 

On 2000.06.17, was observed from New-Zealand, an occultation of HIP 84192 by (164) Eva that let think this asteroid possibly have a satellite. Alan THOMAS and Clive ROWE registered occultation (5.8 and 1.5 s duration, respectively) but Brian LOADER and Lionel HUSSEY laying between the two, saw no event. Consequently, ROWE’s observation, if real, is possibly an occultation by a satellite (at least 25 km in diameter).                                         (All information by courtesy of IOTA)

 

KHL present observation, if real, is irreconcilable with others (his chord is at about 90 km from the southern limb and occurred 43 s sooner than the predicted appulse time for his location). So he perhaps observed a 10 km chord of the hypothetical satellite.

 

 

2004/04/23 : (987) Wallia  / TYC 6119-572-1          CHR (with MID)    ELL        FBI         JLX        NIT           PSY           THO

and one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

trt

43 45 08  N

06 55 26  E

+1270 m

23:24:55.7  ±0.2s

23:24:57.8  ± 0.2s

2.1 ±0.3 s

Event published on FRP web-site www.euraster.net and up-dated by J. MANEK.

ELL : videorecording, observation was only partial due to clouds; CHR, MID, THO : videorecording; FBI and NIT were in double station.

trt positive observation reveals a significant shift toward north (about one path width shift) of the path, which let CHR and MID just outside it.

 
2004/04/26 : (444) Gyptis / TYC 0788-01194-1               ala
 

2004/05/03 : (275) Sapientia  / TYC 6270-02159-1                LEI         PAR

and one perhaps positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

JVA

48 38 50 N

07 42 50 E

+135 m

    01:29:35.48    ± ?
    01:39:36.93   
± ?

    01:31:35.48   ± ?
    01:41:29.62  
± ?

120 ±?
112.7
± ?

JVA : videorecording, two drops of about two magnitude; PAR : videorecording,  observation was disturbed by clouds.

LEI and PAR were in the predicted path but registered no event longer than 2 s.

The duration of the two events recorded  by JVA are each close to the maximal value (132 s), which is a problem : one of them is obviously an artefact, if not the two, as the appulse at the JVA location occurred at 01:37:15 UT. The wide shift of the shadow path toward west (nearly 2 path widths) needed to explain one event only  would be unlikely.

 

2004/05/04 : (335) Roberta  / TYC 4967-00483-1                  AGH      NVI

Both observers were in double station.

 

2004/05/28 : (37)  Fides  / TYC 6783-00143-1    

Only one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

FMY

47 09 39.7   N

05 45 37.5 E

+290 m

21:12:42.0 ± 0.5 s

21:12:50.0± 0.5 s

8.0 ±0.7 s

FMY : CCD imaging. The prediction was almost exact, since FMY was very close to the predicted centreline of occultation and observed effectively an event with the maximal duration (7.7 s ).

 

2004/06/05 : (22) Kalliope  / TYC 6814-00458-1                    CNS       CQU (with VDC)     FRP        JLX                                                      LAB          LBA PAH       PUM      ROY      SCB       SKJ

And one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

FMY 

47 09 39.7   N

05 45 37.5 E

+290 m

21 10 24.6 ± 0.5 s

21 10 34.6 ± 0.5 s

10.0 ±0.8 s

FMY : CCD imaging; FRP, SCB : videorecording; PUM, ROY : CCD drift-scan.
FRP transmitted a negative observation by COF.

(22) Kalliope is known to have a satellite S/20018 (22)_1 (Linus).  Its track was predicted to run about 800 km south of the main body path, i.e. over Greece, Sardinia and the northern part of Spain. All the observers failed to observe any event in relation with this 36 km body.

The event observed by FMY is an occultation by the main body Kalliope itself.

According to the 3D model developed by J. BERTHIER (IMCCE),  Kalliope’s profile at the occultation time was elongated (160 km ´ 220 km) and the shadow path width slightly increased (by about 25 km, in the Bessel plane), relative to the predictions, which used a 181 to 187 km mean diameter. Negative observations by LBA and ROY (just near the southern border of the predicted paths, inside the J. MANEK’s one, outside the S. PRESTON’s one) imply a small shift of the real path by at least half of these 25 km toward north (less than 0.1 path width).

 

2004/06/05 : (780)  Armenia  / TYC 0418-00502-1   CNS     LAB       PAH       PUM      SCB       trt

And one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

GCV

39 31 22.6 N

08 23 01.5 W

+90 m

22:58:57.79  ± 0.05 s

22:59:03.19  ± 0.05 s

5.4 ±0.07 s

PUM : CCD drift-scan; GCV, SCB : videorecording.

GCV was exactly on the centreline of the predicted path. As he registered an event duration shorter than the maximal predicted value (about 7.5 s), there must have been a slight shift of the real path.

 

2004/06/14 : (559)  Nanon  / 2UCAC 24710200                                    JLX

Euraster event, up-dated by J. MANEK.

 

2004/06/22 : (569)  Misa / TYC 6875-02039-1                                       UTF

Euraster event, up-dated by J. MANEK : shadow path was predicted to be shifted far toward south.

 

2004/07/21 : (773) Irmintraud  / HIP 186                amg        BCL       BOL       CAS (with PAH)   CBA         CNS    CPE                                                   CTM          EMA      FNZ       FOC       FRP        FVE       JLX        JNK          JSZ      LVY                                        MBU         PAR       pdm        PUM RVA      SCB       SEN       TOM         VAI    VSP                                                   XBS

CAS : CCD imaging; FRP, PAR, pdm, VSP : videorecording; PUM : CCD drift-scan

JSZ and CTM were in double station.

amg : blinks probably due to clouds (J. Mc FARLAND observing a few meters away registered cloudy conditions).

Many observers were in the shadow path but didn’t observe any event. There must have been an important shift toward East (about one path width) but the lack of positive observation made it impossible to fix precisely.

FRP transmitted a negative observation by COF.
 
 

2004/07/26 : (419) Aurelia / TYC 5558-00816-1                    BCL       UTF

 

2004/07/31 : (849) Ara / TYC 1988-01854-1                          CHR (with MID)       FIM        GBH      HMG                                                                             JGS        JHP        MKM     OTA       PAR       SHB

JGS : videorecording, survey not including appulse time; CHR, MID : CCD drift-scan; PAR : videorecording.
Up-dated prediction by S. PRESTON (PST) issued on 2004/07/23 on his web-site  http://www.asteroidoccultation.com shifted the path toward north, over Scandinavia.
 
 

2004/08/10 : (8) Flora / TYC 1304-00296-1                                           HAL

 

2004/08/15 : (1712) Angola / TYC 2251-00099-1                                  DGE

 

2004/08/22 : (626) Notburga  / HIP 105566                                           BCL

BCL was in the up-dated shadow paths published on Euraster and Michael SCHMIDT (SMI) http://www.uni-mainz.de/~michschm/Ast2004  web-sites.

 

 

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

 

 

2004/04/01 : (2295) Matusovskij  /2UCAC 38252192            BOL       PAR

Euraster event; PAR : videorecording.

 

2004/04/01 : (3557) Sokolsky  /TYC 1319-00510-1                BOL

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

 

2004/04/02 : (2632) Guizhou  /TYC 0278-00419-1                 MRX      PAR

Event published on Euraster and KRT web-sites; PAR : videorecording.

 

2004/04/11 : (10490) 1985 VL /2UCAC 33387705                JNK        OTA

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

 

2004/04/12 : (27920) 1996 VV8  / TYC 2508-00648-1u         JNK

Event published on  NVI web-site.

 

2004/04/15 : (31062) 1996 TP 10  / HIP 50271                       BNN      DGE       FRP        LVY       PAR

Euraster event.  FRP, PAR : videorecording. Uncertainty was very large for this 15 km asteroid.

 

2004/04/16 : (1642) Hill  / TYC2 5517-00369-1                      JNK

Event published on Euraster and KRT web-sites.

 

2004/05/01 : (3902) Yoritomo  / TYC 6092-00931-1              BOL

Event published on Euraster and SMI web-sites; BOL : was very close to the predicted path; uncertain observation from 20:41 to 20:45, for a predicted appulse at 20:41:40 (clouds and strong moonlight).

 

2004/05/05 : (146) Lucina  / TYC 1965-01032-1                    RTH

and one perhaps positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

IVY

51 35 53 N 

38 36 25 E 

+200 m

19:42:09.17  ± 0.12 s

19:42:18.55  ± 0.23 s

9.38 ±0.31 s

 

A possible satellite of (146) Lucina might have been observed during previous events :  in 1982 (videorecording at the Meudon Obs.  1 m - telescope) and in 2001 (R. DUSSER reported a 1.9-s extinction when he observed visually a Lucina occultation on 2001.05.01). Its size could be ~15 km, and it can be anywhere as far apart as 2000 km from the main body. 

Event published on KRT, NVI, PST web-sites.

RTH  : videorecording.

IVY was situated on the centreline of the shadow path, since he registered a duration close to the max predicted one : 8.2 s. There must have been a small shift relative to NVI and PST predictions (0.6 path width toward SW), whereas KRT prediction was nearly exact.

 

2004/05/15 : (876) Scott  / TYC 1403-01097-1u                     DGE

event published on  KRT and SMI web-sites.

 

2004/05/18 : (1277) Dolores  / TYC 6142-00233-1                 PAH

Event published on  KRT web-site.

 

2004/05/24 : (783) Nora  / TYC 5072-01230-1

Only one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

PBV

53 15 21 N 

50 14 04 E 

+190 m

About  20:43   

5.2 ±0.8 s

Event published on NVI and PST web-sites.

PBV : gradual disappearance lasting ~1.5 s. He was situated 22 km north from the predicted northern limit but registered a long duration relative to the max predicted one : 7.1 s – so the real track must have been shifted by about one path width toward north.

 

2004/05/29 : (386)  Siegena  / 2UCAC33437282                   

Only one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

MDT

36 45 58  N

03 52 14  E

+154 m

02:40:00.8  ± 0.3 s

02:40:17.3  ± 0.3 s

16.5 ±0.5 s

Event published on PST web-site.

Prediction was nearly exact since MDT was situated on the centreline and effectively registered a duration close to the max predicted one : 15.3 s.

 

2004/06/24 : (23135) 2000 AN 146  / 2UCAC 23408140                      BCL

BCL was in the predicted shadow path published on Euraster; uncertainty was large for this event.

 

2004/07/02 : (1683) Castafiore  / TYC 5816-00089                               JLX (with COF)

pdm observatory was in the predicted shadow path published on Euraster.

 

2004/07/10 : (1633) Chimay  / 2UCAC 27214937                                 UTF

UTF was just at the northern border of the shadow path; uncertainty was large for this event.

 

2004/07/19 : (1800) Aguilar  / TYC 6291-01924-1                                NVI

Event published on  NVI web-site.

 

2004/07/24 : (3345) Tarkovskij / TYC 6335-00367-1                           OKE

Event published on  SMI web-site; OKE : videorecording.

 

2004/07/27 : (1719) Jens / HIP 105953                                    BGS       BLM      BOL       BTG       DGE                                                                                          HMG      JGS        OKE       PAR

Event published on  PST web-site.

BGS : CCD imaging; JGS, OKE, PAR : videorecording; PAR : clouds at the appulse time.

 

2004/07/29 : (13399) 1999RJ88/ TYC 5226-00166-1u                          JNK

Event published on  NVI web-site.

 

2004/07/29 : (611) Valeria / TYC 0654-00573-1                                    PAR

PAR : videorecording.
 

2004/08/01 : (1574) Meyer / 2UCAC 29914624                     CHR       HRB       MRX      OKE       PAR

And two possibly positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

JLX

48 48 17.9 N

02 13 48.3 E

+168 m

20:51:12.1   ± 0.1 s

20:51:20.5 ± ?

8.4 ± ?

OKE

50 08 17.4 N

08 21 50.4 E

+256 m

20:50:25 ± 1 s

20:50:29 ± 1 s

About  4 s

Event published on  PST and Euraster web-sites. Target star was faint (Mv = 11.6) and 37° apart from full moon.

HRB, OKE : videorecording;  PAR : wrong star has been monitored.

MRX was just at the southern border. OKE was just at the northern border and registered an extinction about 15 s before the predicted time. OKE comment : “Star was very, very faint. I checked the tape from 20:50:00 to 20:52:00 UT several times. Star "maybe"disappeared for some seconds around 20:50:27, but I think star was lost in noise.”

JLX was well within the predicted shadow path. As the maximum  predicted duration was 4.4 s, part of the observation (probably the emersion) is spurious. The best indication in favour of a real event is the good time agreement with  PST prediction (~6 seconds early).

2004/08/04 : (1685) Toro / 2UCAC 47494283                                       HRB

Event published on  KRT web-site.

2004/08/05 : (6236) Mallard / TYC 5256-00019-1                                NVI

Event published on  NVI web-site.

2004/08/06 : (4043) Perolof / TYC 5802-01141-1                                  JGS        JNK

event published on  NVI web-site.

2004/08/08 : 2001 QD298 / 2UCAC 24989527                                      HCP       KFT        UTF

Event involving a Trans Neptunian Object, published on  D. DENISSENKO web-site http://hea.iki.rssi.ru/~denis/smallocc.html

HCP, KFT :  videorecording. HCP was with PAR and NGK, and in double station with KFT.

 

2004/08/12 : (50) Virginia / 2UCAC 38561919                                     NVI

Event published on  NVI web-site.

2004/08/23 : (1491) Balduinus   / TYC 0585-00973-1u                         DGG      PAR

and one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

Duration

ESE

N 49 41 10

E 21 46 03

280m +

21:43:29.9 ± 0.3 s

21:43:30.7 ± 0.3 s

0.8 ±0.4 s

Event published on  SMI, Euraster and NVI web-sites; ESE was situated at nearly five path width of the predicted tracks.

 

2004/08/24 : (1243) Pamela   / 2UCAC 34027613                                 NVI

and one positive :

Abbr

Latitude

Longitude

Height

Disappearance UT

Reappearance UT

SUP

54 29 24 N

30 13 19 E

+200 m

Blink at 22:53:26.1  ± 0.1 s

Event published on  NVI web-site. SUP :  no reaction time given. These two observations (one negative and one positive) are in agreement with the prediction.

 

2004/08/28 : (2137) Priscilla   / TYC 5231-01309-1u             ala           DGG      ESE        SHI

Event published on  Euraster. SHI : videorecording, was in the predicted path and DGG just at the northern border.

 

16 Reports have been sent by Tsutomu HAYAMIZU from JOIN (Japanese Occultation Information Network), about observations (one positive, one doubtful) of the occultation 
of TYC 0272-00256-1 (mag. 9.7) by  (253) Mathilde on 2004.04.09.

Predictions with finder charts and up-dated shadow path are regrouped (since September 2004) on the EAON web-site: http://astrosurf.com/eaon, maintained by Jean SCHWAENEN.

Reports are diffused on Internet by “PLANOCCULT”. To subscribe to this free service, send an E-Mail to listserv@Aula.com with the following text : subscribe planoccult Your Name, Your Country -and to unsubscribe, send an E-Mail to listserv@Aula.com, with text : unsubscribe planoccult.

Received reports and results are summarized on www.euraster.net, a web page 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 (“shepherd observations”), refine the orbit of the asteroid or discover un unknown satellite ! Attention, there is no need to send a report if the weather conditions have prevented the event observation.

 

Please DON’T FORGET to use the IAU format for the date, YY.MM.DD.

 

 

G. REGHEERE gillesregheere@yahoo.fr

13 bis rue de l’église

78890  GARANCIERES  -  France