4 Sagittarii

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4 Sagittarii
Location of 4 Sagittarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 17h 59m 47.55132s[1]
Declination −23° 48′ 58.0269″[1]
Apparent magnitude (V) 4.74[2]
Characteristics
Spectral type B9V[3]
U−B color index −0.03[4]
B−V color index -0.05[4]
Distance
390 ± 20 ly
(120 ± 6 pc)
Absolute magnitude (MV)−0.77[2]
Details
Rotational velocity (v sin i)
149[6] km/s
HR 6700, SAO 186061, GSC 06841-01403[7]
Database references
SIMBADdata

4 Sagittarii is a suspected

apparent visual magnitude of 4.74,[2] The system is moving closer to the Earth with a heliocentric radial velocity of −18 km/s.[5]

The visible component is a

Sun's luminosity from its photosphere at an effective temperature of 9,661 K.[6]

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 119257644. Vizier catalog entry
  3. ^
    Bibcode:1995yCat.5050....0H
    .
  4. ^
    Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. ^
    S2CID 119231169
    .
  6. ^
    S2CID 55586789. Vizier catalog entry
  7. ^ "4 Sgr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-23.
  8. S2CID 14878976
    .
  9. S2CID 119273474
    .
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