Upsilon Andromedae d
extrasolar planet
Upsilon Andromedae d is an extrasolar planet. It orbits the Sun-like star Upsilon Andromedae A.
Upsilon Andromedae A was the third star known to host a multiple-planet planetary system, the others are the Sun and the pulsar PSR 1257+12.
In 1999, two groups of astronomers independently concluded that a three-planet model best fit the data.[1] The two new planets were designated Upsilon Andromedae C and Upsilon Andromedae D.
References
change- ↑ Butler R.P.; et al. (1999). "Evidence for multiple companions to υ Andromedae". Astrophysical Journal. 526 (2): 916–927. Bibcode:1999ApJ...526..916B. doi:10.1086/308035. S2CID 123172934.