4 Scorpii

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4 Scorpii
Scorpius constellation map.svg
Red circle.svg

Location of 4 Scorpii (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
Right ascension 15h 55m 30.079s[1]
Declination −26° 15′ 57.58″[1]
Apparent magnitude (V) +5.625[2]
Characteristics
Spectral type A3V[3]
Astrometry
Radial velocity (Rv) −29.00 ± 1.7[4] km/s
Proper motion (μ) RA: -35.80[1] mas/yr
Dec.: -30.09[1] mas/yr
Parallax (π) 7.99 ± 0.77[1] mas
Distance 410 ± 40 ly
(130 ± 10 pc)
Absolute magnitude (MV) +0.0197
Details
Mass 2.64[5] M
Luminosity 92[5] L
Temperature 8,356[5] K
Rotational velocity (v sin i) 128[6] km/s
Other designations
CD−25° 11190, HD 142445, HIP 77984, HR 5917, SAO 183931
Database references
SIMBAD data

4 Scorpii is a star in the constellation of Scorpius.

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. 
  3. ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 5: 0. Bibcode:1999MSS...C05....0H. 
  4. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. Bibcode:2006AstL...32..759G. arXiv:1606.08053Freely accessible. doi:10.1134/S1063773706110065. 
  5. ^ a b c Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. Bibcode:2012A&A...537A.120Z. arXiv:1201.2052Freely accessible. doi:10.1051/0004-6361/201117691. 
  6. ^ Royer, F.; Grenier, S.; Baylac, M.-O.; Gómez, A. E.; Zorec, J. (2002). "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i". Astronomy and Astrophysics. 393 (3): 897–911. Bibcode:2002A&A...393..897R. arXiv:astro-ph/0205255Freely accessible. doi:10.1051/0004-6361:20020943.