Xi Telescopii
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 4.95[3] (+4.89 – 4.94)[4] |
| Characteristics | |
| Evolutionary stage | red giant branch[5] |
| Spectral type | K5 III[6] or M1 IIab[7] |
| U−B Template:Engvar | +1.90[3] |
| B−V Template:Engvar | +1.61[3] |
| Variable type | LB:[4] |
| Astrometry | |
| Radial velocity (Rv) | +36.0[8] km/s |
| Proper motion (μ) | RA: −12.98[2] mas/yr Dec.: +7.50[2] mas/yr |
| Parallax (π) | 3.02±0.35 mas[2] |
| Distance | approx. Template:Rnd ly (approx. Template:Rnd pc) |
| Absolute magnitude (MV) | −2.64[9] |
| Details | |
| Mass | 6.6[5] Template:Solar mass |
| Radius | 134[5] Template:Solar radius |
| Luminosity | 3,413[5] Template:Solar luminosity |
| Surface gravity (log g) | 0.99[5] cgs |
| Temperature | 4,529[5] K |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[10] | |
| Database references | |
| SIMBAD | data |
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Xi Telescopii, Latinized from ξ Telescopii, is a solitary[7] star in the southern constellation of Telescopium.[10] It is visible to the naked eye, with an apparent visual magnitude of +4.95.[3] Based upon an annual parallax shift of 3.02 mas as measured from Earth,[2] it is located approximately 1,100 light-years from the Sun.
This is an evolved star with a stellar classification of K5 III[6] or M1 IIab,[7] indicating it is a giant or bright giant star. This is a variable star tentatively classified as a slow irregular-type variable with a brightness that varies between magnitude +4.89 and +4.94.[4] Koen and Eyer examined the Hipparcos data for this star, and found that it varied periodically, with a period of 12.36 days, and an amplitude of 0.0083 magnitudes.[11] With around 56[12] times the Sun's radius, it shines with a luminosity approximately 2,973 times that of the Sun and has a surface temperature of Template:Val.[13]
References
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