Nu Scorpii

ν Scorpii
Location of ν Sco (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
ν Sco A
Right ascension 16h 11m 59.740s[1]
Declination −19° 27′ 38.33″[1]
Apparent magnitude (V) 4.349[1]
ν Sco B
Right ascension 16h 11m 59.746s[2]
Declination −19° 27′ 36.94″[2]
Apparent magnitude (V) 6.60[2]
ν Sco CD
Right ascension 16h 11m 58.603s[3]
Declination −19° 27′ 00.15″[3]
Apparent magnitude (V) 6.30[4]
Characteristics
ν Sco AB
Spectral type B3V[5] / ? / ? / ?
U−B color index –0.63[4]
B−V color index +0.05[4]
ν Sco CD
Spectral type B9III[5] / B9III[5] / ?
U−B color index –0.37[4]
B−V color index +0.13[4]
Astrometry
ν Sco AB
Radial velocity (Rv)2.4 ± 5[6] km/s
Proper motion (μ) RA: –7.65[7] mas/yr
Dec.: –23.71[7] mas/yr
Parallax (π)6.88 ± 0.76 mas[7]
Distanceapprox. 470 ly
(approx. 150 pc)
ν Sco CD
Radial velocity (Rv)–14 ± 5[6] km/s
Proper motion (μ) RA: –4.2[3] mas/yr
Dec.: –18.0[3] mas/yr
Orbit[8]
Primaryν Sco Aa
Companionν Sco Ab
Period (P)5.55206 ± 0.00003
Eccentricity (e)0.11 ± 0.05
Periastron epoch (T)2442185.555 ± 0.349
Argument of periastron (ω)
(secondary)		267 ± 23°
Semi-amplitude (K1)
(primary)		26.5 ± 1.3 km/s
Other designations
Jabbah, ν Sco, 14 Sco, ADS 9951 AB, CCDM J16120-1928AB[9]
ν Sco AB: BD–19° 4333, HD 145502, HIP 79374, HR 6027, SAO 159764[9]
ν Sco CD: BD–19° 4332, HD 145501, HR 6026, SAO 159763[10]
Database references
SIMBADν Sco
ν Sco A
ν Sco B
ν Sco CD

Nu Scorpii (ν Scorpii, abbreviated Nu Sco, ν Sco) is a multiple star system in the constellation of Scorpius. It is most likely a septuple star system,[5] consisting of two close groups (designated Nu Scorpii AB and CD) that are separated by 41 arcseconds.[5] Based on parallax measurements,[7] it is approximately 470 light-years from the Sun.

The component Nu Scorpii Aa is formally named Jabbah /ˈdʒæbə/.[11] (Contrast the similar-sounding Dschubba, Delta Scorpii.)

  1. ^ a b c 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.
  2. ^ a b c Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002). "The Tycho double star catalogue". Astronomy and Astrophysics. 384: 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822.
  3. ^ a b c d Roeser, S.; Bastian, U. (1988). "A new star catalogue of SAO type". Astronomy and Astrophysics Supplement Series. 74: 449–451. Bibcode:1988A&AS...74..449R.
  4. ^ a b c d e Nicolet, B. (1964). "Catalogue of homogeneous data in the UBV photoelectric photometric system". Astronomy and Astrophysics Supplement Series. 34: 1–49. Bibcode:1978A&AS...34....1N. Color indices accessed using SIMBAD.
  5. ^ a b c d e Nu Scorpii Archived 2017-09-05 at the Wayback Machine, entry in the Multiple Star Catalog
  6. ^ a b Evans, D. S. (2006). "The Revision of the General Catalogue of Radial Velocities". Determination of Radial Velocities and Their Applications. 30: 57. Bibcode:1967IAUS...30...57E.
  7. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  8. ^ Cite error: The named reference Levato was invoked but never defined (see the help page).
  9. ^ a b "nu. Sco". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
  10. ^ "nu. Sco C". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 February 2017.
  11. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.