UX Arietis
Avisual band light curve for UX Arietis, adapted from Ulvås and Henry (2003)[1]
03h26m 35.37568s[2]
+28° 42′ 54.2264″[2]
6.35 - 6.71[3]
Characteristics
G5IV[4]
U−B color index
0.43[5]
B−V color index
0.90[5]
Radial velocity (Rv)
+26.53[7] km/s
Proper motion (μ)
RA: +46.794[2] mas/yr
Dec.: −102.876[2] mas/yr
Parallax (π)
Absolute magnitude (MV)
2.91[8]
Primary
Aa
Companion
Ab
Period (P)
6.437888±0.000007 d
Semi-major axis (a)
1.750±0.01 mas
Eccentricity (e)
0 (fixed)
Inclination (i)
125.0±0.5°
113.4±0.4°
Periastron epoch (T)
2456238.134 ± 0.002 HJD
Argument of periastron (ω)
(secondary)
90 (fixed)°
Primary
A
Companion
B
Period (P)
111.02 yr
Semi-major axis (a)
648.0±0.8 mas
Eccentricity (e)
0.77±0.01
Inclination (i)
93.3±0.6°
58.9±0.5°
Periastron epoch (T)
2451664.9±34.3 HJD
Argument of periastron (ω)
(secondary)
274.9±0.8°
Details[9]
UX Ari Aa
1.30±0.06 M☉
5.6±0.1 R☉
9.3±0.7 L☉
Surface gravity (log g)
3.06±0.04 cgs
4,560±100 K
6.44 d[4]
UX Ari Ab
1.14±0.06 M☉
1.6±0.2 R☉
Luminosity
2.34±0.28 L☉
Surface gravity (log g)
4.09±0.16 cgs
5,670±100 K
UX Ari B
0.75 M☉
0.8±0.1 R☉
0.38±0.08 L☉
Surface gravity (log g)
4.51±0.13 cgs
4,930±100 K
Database references
ARICNS
UX Arietis is a triple star system located in the northern zodiacal constellationofAries. Based upon parallax measurements from the Gaia satellite, it is roughly 165 light years away. The primary, component Aa, is a variable star of the RS CVn type. The variability of the star is believed due to a combination of cool star spots and warm flares, set against the baseline quiescent temperature of the stellar atmosphere. The variability appears to be cyclical with a period of 8−9 years.[6] The star varies in brightness from magnitude 6.35 to 6.71, meaning it may be intermittently visible to the unaided eye under ideal dark-sky conditions.[3]
A more distant companion, component C, shares a common proper motion and is at the same distance.[11] It is another cool dwarf star with an estimated spectral class of K2. Any orbit is estimated to require over 100,000 years.[12]
Other
Other
