U Orionis
Variable star in the constellation Orion / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about U Orionis?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
U Orionis (abbreviated U Ori) is a Mira-type variable star in the constellation Orion. It is a classical long period variable star that has been well observed for over 120 years.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Orion |
Right ascension | 05h 55m 49.17076s[1] |
Declination | +20° 10′ 30.6779″[1] |
Apparent magnitude (V) | 4.8 - 13.0[2] |
Characteristics | |
Spectral type | M6e-M9.5e[2] |
B−V color index | +2.07[3] |
Variable type | Mira[2] |
Astrometry | |
Parallax (π) | 3.4924 ± 0.1820 mas[1] |
Distance | 930 ± 50 ly (290 ± 10 pc) |
Details | |
Mass | 0.88[4] M☉ |
Radius | 370±96[5] R☉ |
Luminosity | 7,000[6] L☉ |
Surface gravity (log g) | −0.44[4] cgs |
Temperature | 2,641[4] K |
Metallicity [Fe/H] | 0.54[4] dex |
Other designations | |
Database references | |
SIMBAD | data |
Close