Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Virgo |
Right ascension | 14h 10m 50.48706s [2] |
Declination | −16° 18′ 07.3105″ [2] |
Apparent magnitude (V) | 4.910 [3] |
Characteristics | |
Spectral type | M2 IIIa [4] |
U−B color index | +1.72 [3] |
Variable type | SRB [5] |
Astrometry | |
Radial velocity (Rv) | +18.58±0.56 [6] km/s |
Proper motion (μ) |
RA: +3.277
[2]
mas/
yr Dec.: −10.804 [2] mas/ yr |
Parallax (π) | 5.8655 ± 0.2552 mas [2] |
Distance | 560 ± 20
ly (170 ± 7 pc) |
Absolute magnitude (MV) | −0.81 [7] |
Details | |
Mass | 3.24 [8] M☉ |
Radius | 83 [9] R☉ |
Luminosity | 963 [2] L☉ |
Temperature | 3,899 [2] K |
Metallicity [Fe/H] | −0.21±0.06 [10] dex |
Rotational velocity (v sin i) | 2.3±0.9 [11] km/s |
Other designations | |
Database references | |
SIMBAD | data |
ET Virginis is a single, [13] red-hued star in the equatorial constellation of Virgo. It can be viewed with the naked eye, having an apparent visual magnitude of 4.91. [3] Based upon an annual parallax shift of 5.9 mas, [2] it is located 560 light years away. It is moving further from the Earth with a heliocentric radial velocity of +18.6 km/s, [6] having come within 177 ly of the Sun around 6.3 million years ago. [7]
Period (Days) | 22.6 | 23.8 | 36.4 | 37.6 | 39.8 | 48.8 | 259.1 |
---|---|---|---|---|---|---|---|
Amplitude (mag.) | 0.021 | 0.023 | 0.018 | 0.027 | 0.021 | 0.019 | 0.032 |
This is an evolved red giant star with a stellar classification of M2 IIIa. [4] It is a semiregular variable star of subtype SRB with a magnitude that ranges from a high of 4.80 down to 5.00. [5] The measured angular diameter of this star, after correcting for limb darkening, is 4.79±0.34 mas. [14] At its estimated distance, this yields a physical size of 83 times the radius of the Sun.
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Virgo |
Right ascension | 14h 10m 50.48706s [2] |
Declination | −16° 18′ 07.3105″ [2] |
Apparent magnitude (V) | 4.910 [3] |
Characteristics | |
Spectral type | M2 IIIa [4] |
U−B color index | +1.72 [3] |
Variable type | SRB [5] |
Astrometry | |
Radial velocity (Rv) | +18.58±0.56 [6] km/s |
Proper motion (μ) |
RA: +3.277
[2]
mas/
yr Dec.: −10.804 [2] mas/ yr |
Parallax (π) | 5.8655 ± 0.2552 mas [2] |
Distance | 560 ± 20
ly (170 ± 7 pc) |
Absolute magnitude (MV) | −0.81 [7] |
Details | |
Mass | 3.24 [8] M☉ |
Radius | 83 [9] R☉ |
Luminosity | 963 [2] L☉ |
Temperature | 3,899 [2] K |
Metallicity [Fe/H] | −0.21±0.06 [10] dex |
Rotational velocity (v sin i) | 2.3±0.9 [11] km/s |
Other designations | |
Database references | |
SIMBAD | data |
ET Virginis is a single, [13] red-hued star in the equatorial constellation of Virgo. It can be viewed with the naked eye, having an apparent visual magnitude of 4.91. [3] Based upon an annual parallax shift of 5.9 mas, [2] it is located 560 light years away. It is moving further from the Earth with a heliocentric radial velocity of +18.6 km/s, [6] having come within 177 ly of the Sun around 6.3 million years ago. [7]
Period (Days) | 22.6 | 23.8 | 36.4 | 37.6 | 39.8 | 48.8 | 259.1 |
---|---|---|---|---|---|---|---|
Amplitude (mag.) | 0.021 | 0.023 | 0.018 | 0.027 | 0.021 | 0.019 | 0.032 |
This is an evolved red giant star with a stellar classification of M2 IIIa. [4] It is a semiregular variable star of subtype SRB with a magnitude that ranges from a high of 4.80 down to 5.00. [5] The measured angular diameter of this star, after correcting for limb darkening, is 4.79±0.34 mas. [14] At its estimated distance, this yields a physical size of 83 times the radius of the Sun.