HD 177765

HD 177765
Location of HD 177765 (circled)
Observation data
Epoch J2000.0[1]      Equinox J2000.0[1]
Constellation Sagittarius
Right ascension 19h 07m 09.77940s
Declination −26° 19′ 54.5064″
Apparent magnitude (V) 9.15[2]
Characteristics
Evolutionary stage A5 SrEuCr[3]
B−V color index 0.45[2]
J−H color index 0.071[4]
J−K color index 0.055[4]
Astrometry
Proper motion (μ) RA: -2.063[1] mas/yr
Dec.: −4.425[1] mas/yr
Parallax (π)2.5411 ± 0.0186 mas[1]
Distance1,284 ± 9 ly
(394 ± 3 pc)
Absolute magnitude (MV)1.55,[5] 1.166[6]
Details[5]
Mass1.81, 2.2[7] M☉
Radius2.57 R☉
Luminosity18.9, 26.9,[6] ~32[7] L☉
Surface gravity (log g)3.79 cgs
Temperature7420, 7002,[6] 8000[7] K
Rotational velocity (v sin i)2.50[8] km/s
Age955 Myr
Other designations
CD−26° 13816, CPD−26° 6650, Gaia DR2 6763969142066777344, HD 177765, SAO 187692, PPM 269324, EPIC 214503319, TIC 465996299, TYC 6882-1808-1, GSC 06882-01808, 2MASS J19070978-2619543, Renson 49550[4]
Database references
SIMBADdata

HD 177765 is a white-hued star in the southern constellation of Sagittarius. With an apparent magnitude of 9.15, it is too faint to be seen by the naked eye from Earth, but is dimly visible using binoculars.[9] It is located at a distance of 1,284 light-years (394 parsecs) according to Gaia EDR3 parallax measurements.

  1. ^ a b c d Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference TYC2000 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Renson2009 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference simbad was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Glagolevskij2019 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Scholz2019 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Alentiev2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Ghazaryan2019 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference bino was invoked but never defined (see the help page).