Astronomy:HD 46588
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 06h 46m 14.1500s[1] |
| Declination | +79° 33′ 53.3185″[1] |
| Apparent magnitude (V) | +5.44[2] |
| Characteristics | |
| Spectral type | F7 V[3] |
| U−B color index | −0.02[4] |
| B−V color index | +0.53[4] |
| Astrometry | |
| Radial velocity (Rv) | 15.2±0.2[5] km/s |
| Proper motion (μ) | RA: −99.163[1] mas/yr Dec.: −604.042[1] mas/yr |
| Parallax (π) | 54.9380 ± 0.0595[1] mas |
| Distance | 59.37 ± 0.06 ly (18.20 ± 0.02 pc) |
| Absolute magnitude (MV) | +4.18[2] |
| Details | |
| Mass | 1.13+0.03−0.02[6] M☉ |
| Radius | 1.19[7] R☉ |
| Luminosity | 1.82[7] L☉ |
| Surface gravity (log g) | 4.40±0.02[6] cgs |
| Temperature | 6,273±91[6] K |
| Metallicity [Fe/H] | −0.12±0.06[6] dex |
| Rotational velocity (v sin i) | 6.63[8] km/s |
| Age | 1.27+1.65−0.22[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 46588 (HR 2401; Gliese 240.1) is a star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.44,[2] allowing it to be faintly seen with the naked eye. The object is relatively close at a distance of only 59 light years[1] but is receding with a heliocentric radial velocity of 15 km/s.[5]
HD 46588 is an ordinary F-type main-sequence star with a spectral classification of F7 V.[3] It has 113% the mass of the Sun[6] and 119% its radius.[7] It shines at 182% the luminosity of the Sun[7] from its photosphere at an effective temperature of 6,273 K,[6] giving it a yellow white glow. Isochronic measurements place HD 46588's age at 1.27 billion years,[6] but it's poorly constrained. The star's metallicity is 76% that of the Sun[6] and spins modestly with a projected rotational velocity of 6.63 km/s.[8]
Due to the star's close proximity to Earth and similarity to the Sun, it has been well studied by astronomers.[9] No planets have been found, but a brown dwarf companion was discovered in a WISE survey in 2011. It has a mass of 67.04+8.38
−19.90 Jupiter masses and a temperature of 1360+50−80 K.[9] An infrared excess has been discovered around HD 46588, indicating a cold debris disk with a temperature of 60 K.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| dust disk | 26.34 AU | — | — | |||
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Abt, Helmut A. (23 December 2008). "Mk Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement Series 180 (1): 117–118. doi:10.1088/0067-0049/180/1/117. ISSN 0067-0049. Bibcode: 2009ApJS..180..117A.
- ↑ 4.0 4.1 Cowley, A. P.; Hiltner, W. A.; Witt, A. N. (December 1967). "Spectral classification and photometry of high proper motion stars.". The Astronomical Journal 72: 1334. doi:10.1086/110413. ISSN 0004-6256. Bibcode: 1967AJ.....72.1334C.
- ↑ 5.0 5.1 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (June 2018). "Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert". Astronomy & Astrophysics 614: A55. doi:10.1051/0004-6361/201732209. ISSN 0004-6361. Bibcode: 2018A&A...614A..55A.
- ↑ 7.0 7.1 7.2 7.3 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
- ↑ 8.0 8.1 Martínez-Arnáiz, R.; Maldonado, J.; Montes, D.; Eiroa, C.; Montesinos, B. (September 2010). "Chromospheric activity and rotation of FGK stars in the solar vicinity". Astronomy and Astrophysics 520: A79. doi:10.1051/0004-6361/200913725. ISSN 0004-6361. Bibcode: 2010A&A...520A..79M.
- ↑ 9.0 9.1 Loutrel, N. P.; Luhman, K. L.; Lowrance, P. J.; Bochanski, J. J. (12 September 2011). "DISCOVERY OF A COMPANION AT THE L/T TRANSITION WITH THE<i>WIDE-FIELD INFRARED SURVEY EXPLORER</i>". The Astrophysical Journal 739 (2): 81. doi:10.1088/0004-637X/739/2/81. ISSN 0004-637X. Bibcode: 2011ApJ...739...81L.
- ↑ Gáspár, András; Rieke, George H.; Ballering, Nicholas (29 July 2016). "The Correlation Between Metallicity and Debris Disk Mass". The Astrophysical Journal 826 (2): 171. doi:10.3847/0004-637X/826/2/171. Bibcode: 2016ApJ...826..171G.
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