Tau Tauri
Template:Short descriptionScript error: No such module "Distinguish".
Template:Location mark Location of τ Tauri (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.27[2] |
| Characteristics | |
| Spectral type | B3V[3] + ? + A0V–A2V[4] + A1V[5] |
| U−B Template:Engvar | -0.57[6] |
| B−V Template:Engvar | -0.14[6] |
| Astrometry | |
| Radial velocity (Rv) | +14.60[7] km/s |
| Proper motion (μ) | RA: -2.89[1] mas/yr Dec.: -21.86[1] mas/yr |
| Parallax (π) | 8.19±0.88 mas[1] |
| Distance | approx. Template:Rnd ly (approx. Template:Rnd pc) |
| Absolute magnitude (MV) | -1.15[2] |
| Orbit[8] | |
| Primary | Aa |
| Period (P) | Script error: No such module "val". |
| Semi-major axis (a) | ≤ Script error: No such module "convert". |
| Eccentricity (e) | Script error: No such module "val". |
| Periastron epoch (T) | Script error: No such module "val". |
| Argument of periastron (ω) (secondary) | Script error: No such module "val".° |
| Semi-amplitude (K1) (primary) | Script error: No such module "val". km/s |
| Details | |
| Aa | |
| Mass | 6.4[9] Template:Solar mass |
| Luminosity | 1,472[10] Template:Solar luminosity |
| Surface gravity (log g) | 2.60[11] cgs |
| Temperature | 18,700[10] K |
| Metallicity [Fe/H] | -0.51[11] dex |
| Rotational velocity (v sin i) | 115[12] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[13] | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
Tau Tauri, Latinized from τ Tauri, is a quadruple star system[5] in the constellation Taurus. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.33.[14] The distance to this system is approximately about 400 light years based on parallax.[1] The system is moving further from the Earth with a heliocentric radial velocity of +14.6 km/s,[7] and it is a member of the Taurion OB association, located between Orion and Taurus.[15] It is located 0.7 degree north of the ecliptic, and thus is subject to lunar occultations.[4]
The blue-white hued primary, component Aa, is a B-type main-sequence star with a stellar classification of B3V.[3] It was found to be a close spectroscopic binary in 1903 by American astronomers Edwin B. Frost and Walter S. Adams. The pair have an orbital period of 2.96 days and eccentricity of 0.05.[8] A second companion, white-hued component Ab, has magnitude 6.97 and angular separation 0.2" from the primary in a 58-year orbit.[16][5] This is a probably A-type main-sequence star with a class of A0V–A2V.[4] The more distant component B is a type A1V star with magnitude 7.2 and separation 62.8".[5]
References
<templatestyles src="Reflist/styles.css" />
- ↑ a b c d e f Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b c d Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1".Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
Script error: No such module "Check for unknown parameters".