26 Arietis
Star in the constellation Aries
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26 Arietis is a variable star in the northern constellation of Aries. 26 Arietis is the Flamsteed designation; it also bears the variable star designation UU Arietis. The apparent visual magnitude of this star is 6.14,[5] which, according to the Bortle Dark-Sky Scale, is within the naked eye visibility limit in dark rural skies. The annual parallax shift of 14.03 mas[2] is equivalent to a distance of approximately 232 light-years (71 parsecs) from Earth. The star is receding from the Earth with a heliocentric radial velocity of +15 km/s.[6]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Aries |
| Right ascension | 02h 30m 38.41713s[2] |
| Declination | +19° 51′ 19.0921″[2] |
| Apparent magnitude (V) | 6.10 - 6.15[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | A9 V[4] |
| U−B color index | +0.102[5] |
| B−V color index | +0.248[5] |
| Variable type | Delta Scuti variable[3] |
| Astrometry | |
| Radial velocity (Rv) | +15.0[6] km/s |
| Proper motion (μ) | RA: +79.920[2] mas/yr Dec.: −34.779[2] mas/yr |
| Parallax (π) | 14.0324±0.0822 mas[2] |
| Distance | 232 ± 1 ly (71.3 ± 0.4 pc) |
| Absolute magnitude (MV) | 1.89[7] |
| Details | |
| Mass | 1.74[8] M☉ |
| Radius | 2.32+0.11 −0.12[9] R☉ |
| Luminosity | 15[7] L☉ |
| Surface gravity (log g) | 3.84[7] cgs |
| Temperature | 7,430[7] K |
| Rotational velocity (v sin i) | 186[10] km/s |
| Age | 1.075[8] Gyr |
| Other designations | |
| 26 Ari, UU Arietis, BD+19°365, FK5 2172, HD 15550, HIP 11678, HR 729, SAO 92979[11] | |
| Database references | |
| SIMBAD | data |
Michel Breger discovered that 36 Arietis is a variable star in 1969.[12] It was given its variable star designation in 1970.[13] It is a Delta Scuti variable[7] with a variability period of 0.0676 days and an amplitude of 0.010 in magnitude.[14] It is an A-type main sequence star with a stellar classification of A9 V.[4] The star is around a billion years old with 1.74[8] times the mass of the Sun and 2.32[9] times the Sun's radius. The star is radiating 15 times the luminosity of the Sun from its photosphere at an effective temperature of 7,430 K.[7]