Samh

Database links to Samh

Exoplanet Samh
Constellation	Andromeda
Position equinox : J2000.0
Right ascension	01h 36m 47.843s
declination	+ 41 ° 24 ′ 19.65 ″
Orbit data
Central star	Titawin A
Major semi-axis	0.827774 ± 0.000015 AU
eccentricity	0.2596 ± 0.0079
Period of circulation	241.258 ± 0.064 d
Further data
Minimum dimensions	1.981 ± 0.019 M _J
distance	13.57 ± 0.02 pc
history
discovery	Marcy et al.
Date of discovery	1999
Catalog names
υ And c, 50 And c, HR 458 c, GJ 61 c, HD 9826 c

Samh ( Upsilon Andromedae c , also abbreviated υ And c ) is an exoplanet that the approximately 44.25 light years from the sun distant main sequence star Titawin A in the binary system Titawin ( Upsilon Andromedae ) in the constellation Andromeda orbits. It is one of four known planets in the star's planetary system .

Origin of name

Like all exoplanets, Samh was originally designated with the star's official name and a lowercase letter, according to the order in which it was discovered. After a public IAU competition , on December 15, 2015, it was given an official name after Ibn as-Samh , an 11th-century Arab astronomer in al-Andalus .

discovery

After the discovery of the first planet ( Saffar ) in 1996, further investigations of the star with an Échelle spectrograph took place. Astronomers from San Francisco State University and the Harvard-Smithsonian Center for Astrophysics independently concluded that a planetary system with three planets would most closely match the measurements. The two newly announced planets were named Ypsilon Andromedae c and Ypsilon Andromedae d .

properties

It takes Samh about 241,258 days to orbit its central star, with its orbit being very eccentric . It had a major orbit half-axis of a little more than 0.8 AU , which would mean that it would be between the orbits of Earth and Venus in relation to the solar system . Apart from its high orbital eccentricity (greater than that of the dwarf planet Pluto ), υ And c also has a clear orbital inclination towards the outer orbiting planet Majriti, which is mutually 30 °.

The minimum mass of the planet is a little less than two masses of Jupiter . The actual mass could be 13.98 masses of Jupiter. Due to its mass, it is very likely that Samh is a gas planet .

Individual evidence

↑ VizieR: HIP 7513. Retrieved May 19, 2015 .
↑ ^a ^b ^c ^d NASA Exoplanet Archive: ups And c. Retrieved May 19, 2015 .
↑ International Astronomical Union: NameExoWorlds - The Approved Names. Retrieved January 3, 2016 .
^ Butler, R. Paul et al .: Evidence for Multiple Companions to υ Andromedae . bibcode : 1999ApJ ... 526..916B .
^ Curiel, S. et al .: A fourth planet orbiting υ Andromedae . bibcode : 2011A & A ... 525A..78C .
^ ^A ^b McArthur, Barbara E. et al .: New Observational Constraints on the υ Andromedae System with Data from the Hubble Space Telescope and Hobby-Eberly Telescope . bibcode : 2010ApJ ... 715.1203M .

[1] VizieR: HIP 7513. Retrieved May 19, 2015 .

[Exoplanet-2] NASA Exoplanet Archive: ups And c. Retrieved May 19, 2015 .

[3] International Astronomical Union: NameExoWorlds - The Approved Names. Retrieved January 3, 2016 .

[4] Butler, R. Paul et al .: Evidence for Multiple Companions to υ Andromedae . bibcode : 1999ApJ ... 526..916B .

[5] Curiel, S. et al .: A fourth planet orbiting υ Andromedae . bibcode : 2011A & A ... 525A..78C .

[McArthur-6] A ^b McArthur, Barbara E. et al .: New Observational Constraints on the υ Andromedae System with Data from the Hubble Space Telescope and Hobby-Eberly Telescope . bibcode : 2010ApJ ... 715.1203M .