astro.wikisort.org - StarK2-19 is an early K-type[4] or late G-type main sequence star[5] that is magnetically active, and has a light curve that exhibits variations in brightness of ~1%.[5] It is located approximately 976 light-years away in the constellation Virgo. Three confirmed transiting exoplanets are known to orbit this star.
Orangish-hued star in the constellation Virgo
K2-19
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Virgo[1] |
Right ascension |
11h 39m 50.4803s[2] |
Declination |
+00° 36′ 12.875″[2] |
Apparent magnitude (V) |
13.002±0.009[3] |
Characteristics |
Spectral type |
K0 V[4] or G9V[5] |
Apparent magnitude (J) |
11.596±0.024[6] |
Apparent magnitude (H) |
11.208±0.022[6] |
Apparent magnitude (K) |
11.161±0.026[6] |
Apparent magnitude (B) |
13.798±0.020[3] |
Variable type |
Planetary transit variable[7] |
Astrometry |
---|
|
---|
Radial velocity (Rv) | −7.2296±0.0080[8] km/s |
Proper motion (μ) | RA: −18.673(22)[2] mas/yr Dec.: 4.571(15)[2] mas/yr |
Parallax (π) | 3.3410 ± 0.0196 mas[2] |
Distance | 976 ± 6 ly (299 ± 2 pc) |
|
Details[4] |
---|
|
---|
Mass | 0.918±0.064 M☉ |
Radius | 0.881±0.111 R☉ |
Surface gravity (log g) | 4.50±0.10 cgs |
Temperature | 5250±70 K |
Metallicity [Fe/H] | 0.10±0.05 dex |
Rotation | 20.54±0.30 d |
Rotational velocity (v sin i) | 3.00±0.50 km/s |
Age | ≥8[9] Gyr |
|
Other designations |
---|
|
Database references |
---|
SIMBAD | data |
Planetary system
Discovery
The two outer planets were reported as planet candidates during analysis of data from Campaign 1 of the Kepler spacecraft K2 extended mission.[11] Both planets were confirmed by David J. Armstrong and collaborators, who used ground-based telescopes to detect additional transits and measure hour-long transit-timing variations for K2-19b.[7] They were independently validated along with 20 other planets by Benjamin T. Montet and team.[12]
K2-19d was first reported as a planet candidate during a search for candidates from the first year of the K2 Mission[13] and was later validated by Sinukoff et al.[5]
Characteristics
K2-19 has a planetary system with three known planets, of which the two larger ones, K2-19b and K2-19c, are close to the 3:2 mean motion resonance. All three planets orbit closer to their star than the planet Mercury does to the Sun.[4][14]
The K2-19 planetary system[4][8][5]
Companion (in order from star) |
Mass |
Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
Inclination |
Radius |
d |
<14[15] M🜨 |
0.0344±0.0006 |
2.50856±0.00041 |
? |
85.83+2.97 −4.74° |
1.14±0.13 R🜨 |
b |
54.4±8.9 M🜨 |
0.0762±0.0022 |
7.91951+0.00040 −0.00012 |
0.023+0.240 −0.020 |
88.87+0.16 −0.60° |
7.16±0.91 R🜨 |
c |
7.5+3.0 −1.4 M🜨 |
0.1001±0.0029 |
11.9066+0.0021 −0.0014 |
0.183+0.283 −0.003 |
88.92+0.14 −0.41° |
4.34±0.55 R🜨 |
References
- Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
- Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H.Vizier catalog entry
- Nespral, D.; et al. (2017). "Mass determination of K2-19b and K2-19c from radial velocities and transit timing variations". Astronomy and Astrophysics. 601. A128. arXiv:1604.01265. Bibcode:2017A&A...601A.128N. doi:10.1051/0004-6361/201628639. S2CID 55978628.
- Sinukoff, Evan; et al. (2016). "Eleven Multiplanet Systems From K2 Campaigns 1 and 2 and the Masses of Two Hot Super-Earths". The Astrophysical Journal. 827 (1). 78. arXiv:1511.09213. Bibcode:2016ApJ...827...78S. doi:10.3847/0004-637X/827/1/78.
- Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131: 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Vizier catalog entry
- Armstrong, David J.; et al. (2015). "One of the closest exoplanet pairs to the 3:2 mean motion resonance: K2-19b and c". Astronomy and Astrophysics. 582. A33. arXiv:1503.00692. Bibcode:2015A&A...582A..33A. doi:10.1051/0004-6361/201526008. S2CID 8463154.
- Barros, S. C. C.; et al. (2015). "Photodynamical mass determination of the multiplanetary system K2-19". Monthly Notices of the Royal Astronomical Society. 454 (4): 4267–4276. arXiv:1510.01047. Bibcode:2015MNRAS.454.4267B. doi:10.1093/mnras/stv2271.
- Narita, Norio; et al. (2015). "Characterization of the K2-19 Multiple-transiting Planetary System via High-dispersion Spectroscopy, AO Imaging, and Transit Timing Variations". The Astrophysical Journal. 815 (1). 47. arXiv:1510.01060. Bibcode:2015ApJ...815...47N. doi:10.1088/0004-637X/815/1/47.
- "K2-19". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-12-31.
- Foreman-Mackey, Daniel; et al. (2015). "A Systematic Search for Transiting Planets in the K2 Data". The Astrophysical Journal. 806 (2). 215. arXiv:1502.04715. Bibcode:2015ApJ...806..215F. doi:10.1088/0004-637X/806/2/215.
- Montet, Benjamin T.; et al. (2015). "Stellar and Planetary Properties of K2 Campaign 1 Candidates and Validation of 17 Planets, Including a Planet Receiving Earth-like Insolation". The Astrophysical Journal. 809 (1). 25. arXiv:1503.07866. Bibcode:2015ApJ...809...25M. doi:10.1088/0004-637X/809/1/25.
- Vanderburg, Andrew; et al. (2016). "Planetary Candidates from the First Year of the K2 Mission". The Astrophysical Journal Supplement Series. 222 (1). 14. arXiv:1511.07820. Bibcode:2016ApJS..222...14V. doi:10.3847/0067-0049/222/1/14.
- Williams, David R. (2018-09-27). "Mercury Fact Sheet". NASA. Retrieved 2019-01-12.
- Doppler Monitoring of five K2 Transiting Planetary Systems, 2016, arXiv:1604.01413
Virgo constellation |
---|
Stars (list) | |
---|
Star clusters | |
---|
Nebulae | |
---|
Galaxies | Messier | |
---|
NGC | |
---|
Other |
- A1689-zD1
- Abell 1835 IR1916
- Arp 240 (NGC 5257 and NGC 5258)
- Arp 271 (NGC 5426 and NGC 5427)
- BR 1202-0725
- 3C 273
- 3C 279
- 3C 298
- 4C 04.42
- Eyes Galaxies
- GR 8
- IC 1011
- IC 1101
- IC 3258
- IC 3328
- IRAS 12212+0305
- IRAS 13197−1627
- M60-UCD1
- Markarian 50
- Markarian 1318
- PG 1216+069
- PG 1244+026
- PG 1254+047
- PG 1307+085
- PG 1416−129
- PG 1426+015
- PKS 1148-001
- PKS 1167+014
- PKS 1217+023
- PKS 1229−021
- PKS 1302−102
- PKS 1335−127
- PKS 1402+044
- PKS 1405−076
- QSO B1208+1011
- QSO B1243−072
- QSO B1246−057
- QSO B1331+170
- RXJ1242−11
- SMM J14011+0252
- UM 448
- UM 461
- UM 462
|
---|
|
---|
Galaxy clusters | |
---|
Other |
- GRB 930131
- GRB 030328
- GRB 050408
- GRB 050801
- GRB 080310
- North Polar Spur
- SN 1960F
- SN 1981B
- SN 1990B
- SN 1990N
- SN 1991T
- SN 1991bg
- SN 1994D
- SN 1999br
- SN 2002cx
- SN 2007bi
|
---|
Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.
Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии