HAT-P-9 b
Sign in to saveAlso known as Alef
HAT-P-9b, formally named Alef, is an exoplanet approximately 1500 light years away in the constellation Auriga. This planet was found by the transit method on June 26, 2008. It has a mass 78% that of Jupiter and a radius 140% that of Jupiter. As with most transiting planets, this planet is a hot Jupiter, meaning this Jupiter-like planet orbits extremely close to its parent star, taking only 3.92 days to orbit.
In the Vinony graph
Within Vinony's link graph, HAT-P-9 b is referenced by 163 other articles, and connects out to method of detecting extrasolar planets, Israel and star.
It sits within the topics Auriga, Exoplanets discovered by HATNet and Exoplanets discovered in 2008.
Its subject is documented across 12 Wikipedia language editions.
Astronomical data · SIMBAD
- Object type
- Pl
- Distance
- 1,508 light-years
- Coordinates
- RA 110.1686° · Dec 37.1407°
via SIMBAD · CDS Strasbourg
Key facts
- Planet.name
- HAT-P-9b / Alef
- Planet.image
- HAT-P-9b Art.png
- Planet.caption
- An artist's impression of HAT-P-9b.
- Planet.discoverer
- Shporer et al.
- Planet.discovery_site
- Cambridge, Massachusetts
- Planet.discovered
- June 26, 2008
- Planet.discovery_method
- Transit (SuperWASP)
- Planet.apsis
- astron
- Planet.eccentricity
- ~0.0012
- Planet.period
- 3.92289 ± 0.00004 d
- Planet.star
- HAT-P-9
- Planet.mean_radius
- 1.4 ± 0.06
- Planet.mass
- 0.78 ± 0.09
- Planet.surface_grav
- 1.05 g
via Wikipedia infobox
Exoplanet data
- Host star
- HAT-P-9
- Discovered
- 2008
- Discovered by
- HATNet
- Orbital period
- 3.92 days
- Radius
- 15.61 × Earth
- Mass
- 238.05 × Earth
- Equilibrium temp
- 1540 K
- Distance
- 455.20 pc
via NASA Exoplanet Archive
Wikidata facts
- Constellation
- Auriga
- Parent body
- HAT-P-9
- Radius
- 1.4
- Mass
- 0.67
- Orbital period
- 3.92281131
- Image
- Exoplanet Comparison HAT-P-9 b.png
Show 17 more facts
- Commons category
- HAT-P-9 b
- orbital eccentricity
- 0.08
- catalog code
- TIC 371234684b
- time of discovery or invention
- 2009-01-00
- right ascension
- 110.16856766787458
- declination
- 37.14065077992389
- epoch
- J2000.0
- name
- Alef
- semi-major axis of an orbit
- 0.053
- orbital inclination
- 86.4
- M sin i
- 0.748
- discovery method
- transit method
- angular distance
- 0.00011
- right ascension component of proper motion
- -9.630
- declination component of proper motion
- -13.043
- parallax
- 2.1687
- argument of periapsis
- 152
via Wikidata · CC0
~1 min read
Encyclopedic overview
2 sectionsContents
- References
- External links
HAT-P-9b, formally named Alef, is an exoplanet approximately 1500 light years away in the constellation Auriga. This planet was found by the transit method on June 26, 2008. It has a mass 78% that of Jupiter and a radius 140% that of Jupiter. As with most transiting planets, this planet is a hot Jupiter, meaning this Jupiter-like planet orbits extremely close to its parent star, taking only 3.92 days to orbit.
The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is mildly misaligned with the rotational axis of the star, misalignment equal to -16°.
Excerpted from Wikipedia’s “HAT-P-9 b” article, available under the CC BY-SA 4.0 licence.