43 Sagittarii

This article is about d Sagittarii. Not to be confused with δ (delta) Sagittarii.
43 Sagittarii
Location of 43 Sagittarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 19h 17m 38.07906s[1]
Declination −18° 57′ 10.4626″[1]
Apparent magnitude (V) 4.88[2]
Characteristics
Spectral type G8II-III[3]
U−B color index +0.81[4]
B−V color index +1.02[4]
Astrometry
Radial velocity (Rv)+15.20[5] km/s
Proper motion (μ) RA: −10.341[1] mas/yr
Dec.: −10.892[1] mas/yr
Parallax (π)6.9681 ± 0.1875 mas[1]
Distance470 ± 10 ly
(144 ± 4 pc)
Absolute magnitude (MV)-0.96[2]
Details[6]
Mass3.30 M☉
Radius23.99 R☉
Luminosity277 L☉
Surface gravity (log g)2.22 cgs
Temperature4,813 K
Metallicity [Fe/H]−0.18 dex
Rotational velocity (v sin i)4.2[7] km/s
Age350±100[8] Myr
Other designations
d Sgr, 43 Sgr, BD−19°5379, GC 26589, HD 180540, HIP 94820, HR 7304, SAO 162413, GSC 06304-00334[9]
Database references
SIMBADdata

43 Sagittarii is a single[10] star in the southern constellation of Sagittarius. It has the Bayer designation d Sagittarii, while 43 Sagittarii is the Flamsteed designation.[9] This object is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.88.[2] From parallax measurements, it is estimated to lie around 470 light years away from the Sun.[1] The star is drifting further from the Earth with a heliocentric radial velocity of +15.2 km/s.[5] It is located near the ecliptic and thus is subject to lunar occultations.[11]

This is an aging giant/bright giant star with a stellar classification of G8II-III,[3] and is most likely (97% chance) on the horizontal branch.[8] It is around 350[8] million years old with 3.3[6] times the mass of the Sun. Having exhausted the supply of hydrogen at its core, the star has expanded to 24[6] times the Sun's radius and is now generating energy through core helium fusion. It is radiating 277 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,813 K.[6]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference XHIP was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Hoffleit1991 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference MermiliodUBV was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Reffert2015 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference deMedeiros2014 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Stock2018 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Simbad was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Richichi1996 was invoked but never defined (see the help page).