Rho Telescopii

Rho Telescopii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 19h 06m 19.95580s[1]
Declination −52° 20′ 27.2757″[1]
Apparent magnitude (V) +5.17[2]
Characteristics
Spectral type F6 V[3]
B−V color index +0.53[2]
Astrometry
Radial velocity (Rv)+0.1±0.7[4] km/s
Proper motion (μ) RA: +32.47[1] mas/yr
Dec.: −115.24[1] mas/yr
Parallax (π)17.63 ± 0.59 mas[1]
Distance185 ± 6 ly
(57 ± 2 pc)
Absolute magnitude (MV)1.69[5]
Details
Mass1.97[4] M☉
Luminosity25.6[6] L☉
Surface gravity (log g)3.51[4] cgs
Temperature6,303±80[4] K
Metallicity [Fe/H]+0.01[7] dex
Rotational velocity (v sin i)68.5±4.0[5] km/s
Age1.30[4] Gyr
Other designations
ρ Tel, CPD−52° 11356, HD 177171, HIP 93815, HR 7213, SAO 245921[8]
Database references
SIMBADdata

Rho Telescopii (ρ Tel, ρ Telescopii) is the Bayer designation for an astrometric binary[9] star system in the southern constellation of Telescopium. It is visible to the naked eye, with an apparent visual magnitude of +5.17.[2] Based upon an annual parallax shift of 17.63 mas as measured from Earth,[1] it is located approximately 185 light years from the Sun.

This appears to be a single-lined spectroscopic binary as it displays radial velocity variation with a period of 1.7 days.[9] The visible component is an F-type main sequence star with a stellar classification of F6 V.[3] It has about double the mass of the Sun and is radiating 25.6[6] times the solar luminosity from its photosphere at an effective temperature of 6,303 K.[4] The star is a bright X-ray source with a luminosity of 65.76×1029 ergs s−1.[10]

Relative to neighboring stars, Rho Telescopii has a peculiar velocity of 17.2 km s−1.[11] It may be a member of the Tucana-Horologium association.[12]

Various age estimates
Age Source
1.5±0.2 Myr Tetzlaff et al. (2011)[11]
30 Myr Lagrange et al. (2013)[9]
0.20 Gyr Ballering et al. (2013)[13]
1.30 Gyr Casagrande et al. (2011)[4]
  1. ^ a b c d e f Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Casagrande2011 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference AmmlerVonEiff2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Maldonado2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference Lagrange2013 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Makarov2003 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference mnras410_1_190 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference aaa480_3_735 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Ballering2013 was invoked but never defined (see the help page).