| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 18m 32.02296s [1] |
| Declination | −47° 52′ 30.9957″ [1] |
| Apparent magnitude (V) | 4.29 [2] |
| Characteristics | |
| Spectral type | B8 Ve [3] |
| U−B color index | −0.41 [2] |
| B−V color index | −0.03 [2] |
| Astrometry | |
| Radial velocity (Rv) | +14.90±1.78 [4] km/s |
| Proper motion (μ) |
RA: −29.59
[1]
mas/
yr Dec.: −35.07 [1] mas/ yr |
| Parallax (π) | 9.72 ± 0.71 mas [1] |
| Distance | 340 ± 20
ly (103 ± 8 pc) |
| Absolute magnitude (MV) | −0.57 [5] |
| Details [3] | |
| Mass | 4.42±0.20 M☉ |
| Luminosity | 603 L☉ |
| Surface gravity (log g) | 3.80±0.10 cgs |
| Temperature | 13,470±500 K |
| Rotational velocity (v sin i) | 280±20 km/s |
| Age | 112 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Mu Lupi (μ Lup) is a system of three or four [7] stars in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 4.29 [2] and lies roughly 340 light-years from the Sun.
Two of the components of this system, A and B, form a pair with an angular separation of 1.1 arcseconds. As of 2014, no orbit has been published. Component C lies at an angular separation of 22.6 arcseconds from the AB pair, and may be a common proper motion companion. It is an A-type main-sequence star with a classification of A2 V. A fourth component at an angular separation of 6.15 arcseconds from component A, may be a brown dwarf. [7]
- ^ a b c d e 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.
- ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode: 1986EgUBV........0M.
- ^ a b Levenhagen, R. S.; Leister, N. V. (2006), "Spectroscopic analysis of southern B and Be stars", Monthly Notices of the Royal Astronomical Society, 371 (1): 252–262, arXiv: astro-ph/0606149, Bibcode: 2006MNRAS.371..252L, doi: 10.1111/j.1365-2966.2006.10655.x, S2CID 16492030.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Hubrig, S.; et al. (June 2001), "Search for low-mass PMS companions around X-ray selected late B stars", Astronomy and Astrophysics, 372: 152–164, arXiv: astro-ph/0103201, Bibcode: 2001A&A...372..152H, doi: 10.1051/0004-6361:20010452, S2CID 17507782.
-
^
"* mu. Lup -- Be Star".
SIMBAD.
Centre de données astronomiques de Strasbourg. Retrieved 2017-03-08.
{{ cite web}}: CS1 maint: postscript ( link) - ^ a b Veramendi, M. E.; González, J. F. (July 2014), "Spectroscopic study of early-type multiple stellar systems. II. New binary subsystems", Astronomy & Astrophysics, 567: 10, arXiv: 1405.1084, Bibcode: 2014A&A...567A..35V, doi: 10.1051/0004-6361/201423736, S2CID 21711755, A35.
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Lupus |
| Right ascension | 15h 18m 32.02296s [1] |
| Declination | −47° 52′ 30.9957″ [1] |
| Apparent magnitude (V) | 4.29 [2] |
| Characteristics | |
| Spectral type | B8 Ve [3] |
| U−B color index | −0.41 [2] |
| B−V color index | −0.03 [2] |
| Astrometry | |
| Radial velocity (Rv) | +14.90±1.78 [4] km/s |
| Proper motion (μ) |
RA: −29.59
[1]
mas/
yr Dec.: −35.07 [1] mas/ yr |
| Parallax (π) | 9.72 ± 0.71 mas [1] |
| Distance | 340 ± 20
ly (103 ± 8 pc) |
| Absolute magnitude (MV) | −0.57 [5] |
| Details [3] | |
| Mass | 4.42±0.20 M☉ |
| Luminosity | 603 L☉ |
| Surface gravity (log g) | 3.80±0.10 cgs |
| Temperature | 13,470±500 K |
| Rotational velocity (v sin i) | 280±20 km/s |
| Age | 112 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Mu Lupi (μ Lup) is a system of three or four [7] stars in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 4.29 [2] and lies roughly 340 light-years from the Sun.
Two of the components of this system, A and B, form a pair with an angular separation of 1.1 arcseconds. As of 2014, no orbit has been published. Component C lies at an angular separation of 22.6 arcseconds from the AB pair, and may be a common proper motion companion. It is an A-type main-sequence star with a classification of A2 V. A fourth component at an angular separation of 6.15 arcseconds from component A, may be a brown dwarf. [7]
- ^ a b c d e 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.
- ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode: 1986EgUBV........0M.
- ^ a b Levenhagen, R. S.; Leister, N. V. (2006), "Spectroscopic analysis of southern B and Be stars", Monthly Notices of the Royal Astronomical Society, 371 (1): 252–262, arXiv: astro-ph/0606149, Bibcode: 2006MNRAS.371..252L, doi: 10.1111/j.1365-2966.2006.10655.x, S2CID 16492030.
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv: 1208.3048, Bibcode: 2012A&A...546A..61D, doi: 10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ Hubrig, S.; et al. (June 2001), "Search for low-mass PMS companions around X-ray selected late B stars", Astronomy and Astrophysics, 372: 152–164, arXiv: astro-ph/0103201, Bibcode: 2001A&A...372..152H, doi: 10.1051/0004-6361:20010452, S2CID 17507782.
-
^
"* mu. Lup -- Be Star".
SIMBAD.
Centre de données astronomiques de Strasbourg. Retrieved 2017-03-08.
{{ cite web}}: CS1 maint: postscript ( link) - ^ a b Veramendi, M. E.; González, J. F. (July 2014), "Spectroscopic study of early-type multiple stellar systems. II. New binary subsystems", Astronomy & Astrophysics, 567: 10, arXiv: 1405.1084, Bibcode: 2014A&A...567A..35V, doi: 10.1051/0004-6361/201423736, S2CID 21711755, A35.