49 Librae

Coordinates: Sky map 16h 00m 19.594s, −16° 32′ 00.22″
Source: Wikipedia, the free encyclopedia.
49 Librae
Observation data
Epoch J2000      Equinox J2000
Constellation Libra
Right ascension 16h 00m 19.61087s[1]
Declination –16° 32′ 00.5483″[1]
Apparent magnitude (V) 5.47[2]
Characteristics
Evolutionary stage main sequence
Spectral type F8 V[3]
U−B color index +0.03[2]
B−V color index +0.52[2]
Distance
95.3 ± 0.5 ly
(29.2 ± 0.2 pc)
Absolute magnitude (MV)2.89[4]
Semi-amplitude
(K1)
(primary)		3.847±0.051 km/s
Details
49 Lib A
Gyr
49 Lib B
Mass0.45[3] M☉
HR 5954, SAO 159625, WDS J16003-1632A[7]
Database references
SIMBADdata

49 Librae is the

light years away from the Sun, based on parallax,[1] but is drifting closer with a radial velocity of −20 km/s.[4]

The variable nature of the velocity for 49 Librae was first noted by

mass of the Sun, while the companion only has 0.4 solar masses.[3] The system is a source for radio and X-ray emissions, which may be coming from the secondary companion.[9]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    Bibcode:1978A&AS...34....1N
    .
  3. ^
    S2CID 53648490
    , 46.
  4. ^
    S2CID 119054949
    .
  5. doi:10.1086/168691
    .
  6. S2CID 125888005
    .
  7. ^ "49 Lib". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2013-11-06.
  8. S2CID 122811461
    .
  9. S2CID 118537554
    .
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