HAT-P-4
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes[1] |
| HAT-P-4A | |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | Script error: No such module "val".[3] |
| HAT-P-4B | |
| Right ascension | Template:RA[4] |
| Declination | Template:DEC[4] |
| Apparent magnitude (V) | Script error: No such module "val".[3] |
| Characteristics | |
| HAT-P-4A | |
| Spectral type | G0V[5] |
| B−V Template:Engvar | 0.771 |
| Variable type | planetary transit[6] |
| HAT-P-4B | |
| Spectral type | G2V[5] |
| Astrometry | |
| HAT-P-4A | |
| Radial velocity (Rv) | Script error: No such module "val".[2] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[2] Dec.: Script error: No such module "val". mas/yr[2] |
| Parallax (π) | 3.1071±0.0154 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| HAT-P-4B | |
| Radial velocity (Rv) | Script error: No such module "val".[4] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[4] Dec.: Script error: No such module "val". mas/yr[4] |
| Parallax (π) | 3.0777±0.0155 mas[4] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Position (relative to HAT-P-4A)[5] | |
| Component | HAT-P-4B |
| Epoch of observation | 1999/02/07 |
| Angular distance | Script error: No such module "val".″ |
| Position angle | Script error: No such module "val".° |
| Projected separation | Script error: No such module "val". AU |
| Details | |
| HAT-P-4A | |
| Mass | 1.260Script error: No such module "Su".[7] Template:Solar mass |
| Radius | 1.573±0.015[7] Template:Solar radius |
| Luminosity | 2.8[2] Template:Solar luminosity |
| Surface gravity (log g) | 4.145±0.015[7] cgs |
| Temperature | 5927Script error: No such module "Su".[7] K |
| Metallicity [Fe/H] | Script error: No such module "val".[8] dex |
| Rotational velocity (v sin i) | 5.6 ± 0.9[9] km/s |
| Age | ~4.2 Gyr |
| HAT-P-4B | |
| Mass | 1.0[4] Template:Solar mass |
| Radius | 1.3[4] Template:Solar radius |
| Luminosity | 2.0[4] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[8] cgs |
| Temperature | Script error: No such module "val".[8] K |
| Metallicity [Fe/H] | Script error: No such module "val".[8] dex |
| Age | 7.8[4] Gyr |
| Other designations | |
| HAT-P-4A: Template:Odlist[10] | |
| HAT-P-4B: Template:Odlist[11] | |
| Database references | |
| SIMBAD | A |
| B | |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
Script error: No such module "Check for unknown parameters".
HAT-P-4 is a wide binary star consisting of a pair of G-type main-sequence stars[5] in the constellation of Boötes.[1] It also has the BD designation BD+36°2593.
The star exhibits an infrared excess of unknown origin.[12]
Binary companion
The companion star is located at a distance of 28446 astronomical units and therefore has an orbital period that is extremely long.[5]
Planetary system
The primary star is home to the transiting extrasolar planet HAT-P-4b.[6] This planet is a fairly typical hot Jupiter type planet in a 3-day orbit.[6]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
|}Script error: No such module "Check for unknown parameters".
See also
References
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- ↑ a b Template:Cite constellation
- ↑ a b c d e f Template:Cite Gaia DR3
- ↑ a b Script error: No such module "Citation/CS1". Vizier catalog entry for component A Vizier catalog entry for component B
- ↑ a b c d e f g h i Template:Cite Gaia DR3
- ↑ a b c d e Script error: No such module "Citation/CS1".
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Template:Cite simbad
- ↑ Template:Cite simbad
- ↑ Script error: No such module "Citation/CS1".
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External links
- Image HAT-P-4
- Script error: No such module "citation/CS1".