HD 145377 is a star in the southern constellation Scorpius. It has an apparent visual magnitude of 8.10[2] and can be viewed with a small telescope. The star is located at a distance of 175 light years from the Sun based on parallax, and it is drifting further away with a radial velocity of +11.6.[5] The absolute magnitude of this star is 4.31,[6] indicating it would be visible to the naked eye if it were at a distance of 10 parsecs.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 11m 36.44650s[1] |
| Declination | −27° 04′ 41.4338″[1] |
| Apparent magnitude (V) | 8.10[2] |
| Characteristics | |
| Spectral type | G3V[3] |
| Apparent magnitude (B) | 8.73[2] |
| Apparent magnitude (J) | 7.014±0.018[4] |
| Apparent magnitude (H) | 6.797±0.040[4] |
| Apparent magnitude (K) | 6.706±0.018[4] |
| B−V color index | 0.63[2] |
| Astrometry | |
| Radial velocity (Rv) | +11.610±0.0011[5] km/s |
| Proper motion (μ) | RA: +21.786[1] mas/yr Dec.: +13.039[1] mas/yr |
| Parallax (π) | 18.6669 ± 0.0498 mas[1] |
| Distance | 174.7 ± 0.5 ly (53.6 ± 0.1 pc) |
| Absolute magnitude (MV) | 4.31[6] |
| Details | |
| Mass | 1.129±0.022[7] M☉ |
| Radius | 1.05±0.02 R☉[8] 1.12±0.03[9] R☉ |
| Luminosity | 1.56±0.17 L☉[6] 1.43±0.04[9] L☉ |
| Surface gravity (log g) | 4.38±0.03[9] cgs |
| Temperature | 6,046±15[6] K |
| Metallicity [Fe/H] | 0.12±0.01[6] dex |
| Rotation | 12 days[6] |
| Rotational velocity (v sin i) | 3.85[6] km/s |
| Age | 0.857±0.732[6] Gyr[7] 2.90±1.20[9] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This is an ordinary G-type main-sequence star with a stellar classification of G3V,[3] which indicates it is undergoing core hydrogen fusion. It is 5–12% larger and 13% more massive than the Sun. It may be younger than the Sun, with age estimates in the range of 1–3 billion years. The star is spinning with a projected rotational velocity of 3.85 km/s, giving it a rotation period of ~12 days.[6] The abundance of elements more massive than helium – what astronomers term the star's metallicity – is ~31% higher than in the Sun.[6] The star is radiating around 43% to 56% of the luminosity of the Sun from its photosphere at an effective temperature of 6,046 K.[6]
Planetary system
editIn October 2008 an extrasolar planet, HD 145377 b, was reported to be orbiting this star. This object was detected using the radial velocity method by search programs conducted using the HARPS spectrograph. It is a super-Jupiter in an eccentric orbit with a period of 104 days.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥5.76 ± 0.1 MJ | 0.45 ± 0.004 | 103.95 ± 0.13 | 0.307 ± 0.017 | — | — |
See also
editReferences
edit- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Høg, E.; et al. (2000). The Tycho-2 catalogue of the 2.5 million brightest stars. Vol. 355. pp. L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN 978-0333750889.
{{cite book}}:|journal=ignored (help) - ^ a b Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1982mcts.book.....H.
- ^ a b c Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
- ^ a b Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 52952408.
- ^ a b c d e f g h i j k l m Moutou, C.; et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950". Astronomy and Astrophysics. 496 (2): 513–519. arXiv:0810.4662. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941. S2CID 116707055.
- ^ a b Delgado Mena, E.; et al. (April 2019). "Abundance to age ratios in the HARPS-GTO sample with Gaia DR2. Chemical clocks for a range of [Fe/H]". Astronomy & Astrophysics. 624: 24. arXiv:1902.02127. Bibcode:2019A&A...624A..78D. doi:10.1051/0004-6361/201834783. S2CID 90259810. A78.
- ^ Stassun, Keivan G.; et al. (March 2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes". The Astronomical Journal. 153 (3): 20. arXiv:1609.04389. Bibcode:2017AJ....153..136S. doi:10.3847/1538-3881/aa5df3. S2CID 119219062. 136.
- ^ a b c d Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: A5, 14 pp. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692.
- ^ "HD 145377". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-12-02.
External links
edit- "HD 145377". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2009-06-12.