Ursa Minor (la Petite Ourse)
Le catalogue
ÉTOILES DOUBLES
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Désignation AD (2000.0) DE m1 m2 Écart PA Date Note Spectre
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STF 93 AB Alpha 02 31 47.2 +89 15 51 2.1 9.1 17.8" 216° 1973 [ 1] F7:Ib-IIv
BU 799 AB 13 04 49.7 +73 01 30 6.6 8.4 1.1" 266° 1998 A7IV
HJ 2682 AB 13 40 40.8 +76 50 38 6.7 10.3 25.8" 281° 1991 [ 2] A7V
HJ 2682 AC 13 40 40.8 +76 50 38 6.7 9.0 44.6" 317° 1991 [ 3]
STF 1840 AB 14 19 54.9 +67 46 57 6.9 10.1 27.7" 222° 1999 [ 4] B9V
HJ 2733 AC 5 14 27 31.5 +75 41 46 4.3 9.9 59.6" 134° 1983
HU 908 AB 14 53 03.6 +78 10 36 6.8 8.9 1.4" 242° 1991 K0IV
STF 1972 AB 15 29 11.2 +80 26 55 6.6 7.3 31.7" 78° 2000 [ 5]
STT A143 AB 16 04 48.9 +70 15 42 6.9 8.8 47.2" 83° 1999 [ 6] A0
KU 1 AB 16 43 06.3 +77 30 50 6.1 10.2 2.6" 178° 1991 F5IV
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[ 1] Alpha Umi. Polaris. A Cepheid variable and a spectro-
scopic binary, P = 30yr. A close companion has been
suspected. B is BD+88@7.
[ 2] C is BD+77@518. Proper motion of C -009 -017.
[ 3] C is BD+77@518. Proper motion of C -009 -017.
[ 4] Proper motion of B -021 +009.
[ 5] A is a spectroscopic binary. Composite spectrum:
G0IV-V+G8IV-V. B is BD+80@481, and is also a spectro-
scopic binary.
[ 6] B is BD+70@864.
ÉTOILES VARIABLES
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Nom AD (2000) DE Type Max Min T (Jul) P (jours) F Spectre
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T 13 34.70 +73 25.9 M 7.8 15.0 v 2445761. 301.0 45 M4e-M6e
V 13 38.68 +74 18.6 SRb 7.2 9.1 v 72.0 45 M5IIIaB:
U 14 17.33 +66 47.7 M 7.1 13.0 v 2445418. 330.92 50 M6e-M8e
S 15 29.58 +78 38.0 M 7.5 <13.2 v 2445931. 331.0 50 M6e-M9e
W 16 08.47 +86 12.0 EA/SD 8.51 9.59 V 2433682.323 1.7011576 23 A3
R 16 29.96 +72 16.8 SRb 8.5 11.5 v 325.7 50 M7IIIe
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CIEL PROFOND
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Nom AD (2000) DE Type V B Dim. Dist. Notes
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NGC 5832 14 57.8 +71 41 GSB(rs)b(:) 12.7 13.2 3.7x2.2' 616 km/s
NGC 6068 15 55.5 +79 00 GSBbc(:) 12.6 13.0 1.1x0.71' 4150 km/s Arak 492
NGC 6048 15 57.5 +70 41 GE 13.3 2.2x1.7' 7930 km/s
NGC 6217 16 32.7 +78 12 G(R)SB(rs)bc 11.3 12.0 3.0x2.5' 1540 km/s Arp 185
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