Upsilon Pegasi [SEP] constellation
Upsilon Pegasi
Upsilon Pegasi (υ Pegasi, abbreviated Ups Peg, υ Peg), also named Alkarab , is a star in the constellation of Pegasus. Its apparent magnitude is 4.40 and it is approximately 170.4 light-years distant from the Sun based on parallax.
Nomenclature.
"υ Pegasi" (Latinised to "Upsilon Pegasi") is the star's Bayer designation.
The star bore the traditional Arabic name "Al Karab" ("the Bucket-rope"). In 2016, the IAU
known extrasolar planets, Upsilon Andromedae b was detected by the variations in its star's radial velocity caused by the planet's gravity. The variations were detected by making sensitive measurements of the Doppler shift of Upsilon Andromedae's spectrum. The planet's existence was announced in January 1997, together with 55 Cancri b and the planet orbiting Tau Boötis.
Like 51 Pegasi b, the first extrasolar planet discovered around a normal star, Upsilon Andromedae b orbits very close to its star, closer than Mercury does to our Sun. The