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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