25 Orionis
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 25 Orionis?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
For other stars with this Bayer designation, see ψ Orionis.
25 Orionis, less commonly known by its Bayer designation Psi1 Orionis (ψ1 Orionis, ψ1 Ori) is a fifth-magnitude star in the constellation Orion. It lies among a dense cluster of low-mass pre-main-sequence stars in the Orion OB1a.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Orion |
Right ascension | 05h 24m 44.82738s[1] |
Declination | 01° 50′ 47.2019″[1] |
Apparent magnitude (V) | 4.92 - 4.96[2] |
Characteristics | |
Spectral type | B1Vn[3] |
U−B color index | −0.92[4] |
B−V color index | −0.20[4] |
Variable type | γ Cas[2] |
Astrometry | |
Radial velocity (Rv) | 19.3 ± 2[5] km/s |
Proper motion (μ) | RA: +1.047[1] mas/yr Dec.: +0.433[1] mas/yr |
Parallax (π) | 2.9321 ± 0.1219 mas[1] |
Distance | 1,110 ± 50 ly (340 ± 10 pc) |
Details | |
Mass | 10.5[6] M☉ |
Radius | 6.4[7] R☉ |
Luminosity | 10,500[6] L☉ |
Surface gravity (log g) | 4.0[7] cgs |
Temperature | 24,661 ± 339[7] K |
Rotational velocity (v sin i) | 316[8] km/s |
Age | ~100[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Close