HD 152843

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HD 152843
Observation data
Epoch J2000        Equinox J2000
Constellation Hercules [1]
Right ascension 16h 55m 08.35611s [2]
Declination +20° 29 28.7945 [2]
Apparent magnitude  (V)8.85±0.01 [3]
Characteristics
Evolutionary stage Main sequence [4]
Spectral type G0 [4]
Apparent magnitude  (B)9.38±0.02 [3]
Apparent magnitude  (J)7.896±0.018 [5]
Apparent magnitude  (H)7.655±0.016 [5]
Apparent magnitude  (K)7.629±0.020 [5]
Variable type planetary transit
Astrometry
Radial velocity (Rv)10.06±0.15 [2]  km/s
Proper motion (μ)RA: 14.838±0.010  mas/yr [2]
Dec.: 44.635±0.012  mas/yr [2]
Parallax (π)9.1607 ± 0.0152  mas [2]
Distance 356.0 ± 0.6  ly
(109.2 ± 0.2  pc)
Details [4]
Mass 1.15±0.04  M
Radius 1.43±0.02  R
Surface gravity (log g)4.19±0.03  cgs
Temperature 6310±100  K
Metallicity [Fe/H]−0.16±0.05  dex
Rotation 5.0±0.9  d
Rotational velocity (v sin i)8.38±0.50 km/s
Age 3.97±0.75  Gyr
Other designations
AG+20 1698, BD+20 3347, Gaia DR1  4564566550698800000, Gaia DR2  4564566554995619072, Gaia DR3  4564566554995619072, HD  152843, SAO  84691, PPM  105343, TOI-2319, TIC  349488688, TYC  1529-224-1, GSC  01529-00224, 2MASS J16550834+2029287, YZ  20 5767 [6]
Database references
SIMBAD data
Exoplanet Archive data

HD 152843 (also designated as TOI-2319) is a single star with a pair of close-orbiting exoplanets, [4] located in the northern constellation of Hercules. It is positioned at a distance of 356  light years from the Sun based on parallax measurements, [2] and at that range is too faint to be viewed with the naked eye, having an apparent visual magnitude of 8.85. [4] The system is receding further away with a radial velocity of 10 km/s. [2]

This is a G-type main-sequence star with a stellar classification of G0. [4] It has 1.15 times the mass and 1.43 times the girth of the Sun. Around four billion years of age, [4] HD 152843 is a quiet star, showing very little magnetic activity in its chromosphere. [7] The abundance of iron, a measure of the star's metallicity, is somewhat lower than in the Sun. It is spinning with a projected rotational velocity of 8.4 km/s. [4]

Planetary system

This star has two confirmed exoplanets orbiting it, being designated HD 152843 b and HD 152843 c. Both were discovered using NASA’s Transiting Exoplanet Survey Satellite (TESS) when they were observed transiting their host star. [4]

HD 152843 b is the closest planet to HD 152843, orbiting its host star in just 11.62 days. The planet has 9.8 Earth masses and 3.1 Earth radii. The planet orbits the star at a distance of 0.105 astronomical units (au), has an orbital eccentricity of 0.05, and has an orbital inclination of 89.3°. [8] [7]

HD 152843 c is the second planet in the star system and farthest planet from its star. It has 9.7 Earth masses and 5.9 Earth radii. It orbits its host star at a speed of 7.1 kilometers a second, with its orbital eccentricity being 0.07 and an orbital inclination of 89.2°. [8] Its low density of 0.253+0.059
−0.057
 gcm−3
makes it a super-puff planet. [7]

The HD 152843 planetary system [7]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b9.82+1.71
−1.61
  M🜨
0.1049+0.0029
−0.003
11.62071+0.000096
−0.000106
0.046+0.058
−0.033
89.26+0.51
−0.58
°
3.05±0.11  R🜨
c9.67+1.97
−1.92
  M🜨
0.1482+0.0041
−0.0042
19.502104+0.000074
−0.000085
0.074+0.072
−0.05
89.21+0.53
−0.4
°
5.94+0.18
−0.16
  R🜨
This artist's conception shows a potential appearance of the planets around HD 152843, comparing their size and radius to that of Earth and Neptune HD 152843 System.jpg
This artist's conception shows a potential appearance of the planets around HD 152843, comparing their size and radius to that of Earth and Neptune

Related Research Articles

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<span class="mw-page-title-main">HR 858</span> Star in the constellation Fornax

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<span class="mw-page-title-main">V1298 Tauri</span> Star in the constellation Taurus

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TOI-813 is a bright subgiant G-type star located 858 light-years away from planet Earth. It is too faint to be seen with the naked eye. TOI-813 has a mass of 1.32 solar masses, a radius of 1.95 solar radii and a luminosity of 4.3 times the solar luminosity.

<span class="mw-page-title-main">HD 76920</span>

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<span class="mw-page-title-main">HD 147379</span> Visual binary in constellation Draco

HD 147379 is a wide visual binary between two red dwarfs in the deep northern constellation of Draco. The two stars are located approximately 35.1 light-years (10.8 pc) distant based on Gaia EDR3 parallax measurements, and approaching the Solar System at heliocentric radial velocities of −18.962 km/s and −18.36 km/s, respectively. The brighter primary star, HD 147379A, has an apparent magnitude of 8.9, too faint to be seen by the naked eye from Earth but visible using binoculars. The dimmer secondary, B, fluctuates in apparent magnitude between 10.69 and 10.74, making it observable via a telescope with an aperture of 35 mm or larger.

References

  1. "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008. Retrieved 2024-01-10.
  2. 1 2 3 4 5 6 7 8 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.
  3. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 –L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  4. 1 2 3 4 5 6 7 8 9 Eisner, N. L.; et al. (August 2021). "Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843". Monthly Notices of the Royal Astronomical Society . 505 (2): 1827–1840. arXiv: 2106.04603 . Bibcode:2021MNRAS.505.1827E. doi: 10.1093/mnras/stab1253 . S2CID   235377108.
  5. 1 2 3 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.
  6. "HD 152843". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 1 November 2023.
  7. 1 2 3 4 Nicholson, B. A.; et al. (August 2024). "HD152843 b & c: the masses and orbital periods of a sub-Neptune and a superpuff Neptune". Monthly Notices of the Royal Astronomical Society . 532 (4): 4632–4644. arXiv: 2310.15068 . Bibcode:2024MNRAS.532.4632N. doi: 10.1093/mnras/stae1821 . S2CID   264436430.
  8. 1 2 "HD 152843 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2023-10-22.