Iota Trianguli
Appearance
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Triangulum |
A | |
Right ascension | 02h 12m 22.2797s[1] |
Declination | +30° 18′ 11.053″[1] |
Apparent magnitude (V) | 5.32[2] |
B | |
Right ascension | 02h 12m 22.5637s[3] |
Declination | +30° 18′ 12.342″[3] |
Apparent magnitude (V) | 6.83[2] |
Characteristics | |
A | |
Spectral type | G0 III + G5 III[4] |
B−V color index | +0.856[5] |
Variable type | ellipsoidal + RS CVn[6] |
B | |
Spectral type | F5V + ?[2] |
B−V color index | +0.515[5] |
Astrometry | |
A | |
Proper motion ( | RA: −64.350[1] mas/yr Dec.: −59.503[1] mas/yr |
Parallax ( | 11.3011 ± 0.1024 mas[1] |
Distance | 289 ± 3 ly (88.5 ± 0.8 pc) |
B | |
Proper motion ( | RA: −64.414[3] mas/yr Dec.: −49.913[3] mas/yr |
Parallax ( | 12.7375 ± 0.5496 mas[3] |
Distance | 260 ± 10 ly (79 ± 3 pc) |
Absolute magnitude (MV) | +0.20[7] |
Orbit[8] | |
Primary | Aa |
Companion | Ab |
Period (P) | 14.73018 days |
Semi-major axis (a) | 0.002[9]″ |
Eccentricity (e) | 0.0035 |
Inclination (i) | 55 – 58[9]° |
Semi-amplitude (K1) (primary) | 54.84 km/s |
Semi-amplitude (K2) (secondary) | 56.39 km/s |
Orbit[10] | |
Primary | Ba |
Companion | Bb |
Period (P) | 2.2365 days |
Eccentricity (e) | 0 |
Semi-amplitude (K1) (primary) | 95.4 km/s |
Semi-amplitude (K2) (secondary) | 101.0 km/s |
Details | |
Aa | |
Mass | 2.50[9] M☉ |
Radius | 4.0[8] R☉ |
Luminosity | 61.7[8] L☉ |
Temperature | 4,932[8] K |
Rotational velocity (v sin i) | 32.9[8] km/s |
Ab | |
Mass | 2.43[9] M☉ |
Radius | 1.5[8] R☉ |
Luminosity | 10.0[8] L☉ |
Temperature | 6,486[8] K |
Rotational velocity (v sin i) | 3.0[8] km/s |
Ba | |
Mass | 1.58[9] M☉ |
Bb | |
Mass | 1.56[9] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Iota Trianguli, Latinized from
Both components of
Together with 10 Trianguli and 12 Trianguli, it forms part of the obsolete Triangulum Minus.
References
[edit]- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Harlan, E. A. (September 1969), "MK classifications for F- and G-type stars. I", Astronomical Journal, 74: 916–919, Bibcode:1969AJ.....74..916H, doi:10.1086/110881.
- ^ a b Myers, J. R.; Sande, C. B.; Miller, A. C.; Warren, W. H.; Tracewell, D. A. (2015), "VizieR Online Data Catalog: SKY2000 Master Catalog, Version 5 (Myers+ 2006)", Vizier Online Data Catalog, Bibcode:2015yCat.5145....0M.
- ^ Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e f g h i Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209, S2CID 121883397.
- ^ a b c d e f Tokovinin, Andrei (23 February 2018), "The Updated Multiple Star Catalog", The Astrophysical Journal Supplement Series, 235 (1): 6, arXiv:1712.04750, Bibcode:2018ApJS..235....6T, doi:10.3847/1538-4365/aaa1a5, eISSN 1538-4365.
- ^ Luyten, W. J. (July 1936), "A rediscussion of the orbits of seventy-seven spectroscopic binaries", Astrophysical Journal, 84: 85, Bibcode:1936ApJ....84...85L, doi:10.1086/143751.
- ^ "iot Tri", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2017-06-30.
- ^ Rakos, K. D.; et al. (February 1982), "Photometric and astrometric observations of close visual binaries", Astronomy and Astrophysics Supplement Series, 47: 221–235, Bibcode:1982A&AS...47..221R.
- ^ "Light Curve", Hipparcos ESA, ESA, retrieved 13 September 2022.
- ^ Hall, D. S.; et al. (1980), "6 iota Trianguli: A new variable star", Information Bulletin on Variable Stars, 1764: 1, Bibcode:1980IBVS.1764....1H.
External links
[edit]- Kaler, James B., "6 Trianguli", Stars, University of Illinois, retrieved 2017-07-01.
Categories:
- F-type main-sequence stars
- Rotating ellipsoidal variables
- RS Canum Venaticorum variables
- Objects with variable star designations
- Spectroscopic binaries
- Multiple star systems
- Bayer objects
- Triangulum
- Durchmusterung objects
- Flamsteed objects
- Henry Draper Catalogue objects
- Hipparcos objects
- Bright Star Catalogue objects
- G-type giants