Delta Scuti

δ Scuti
Location of Delta Scuti (circled).
Observation data
Epoch J2000      Equinox J2000
Constellation Scutum
Right ascension 18h 42m 16.42705s[1]
Declination −09° 03′ 09.2004″[1]
Apparent magnitude (V) 4.60 - 4.79[2]
Characteristics
Spectral type F2 IIIp[3]
U−B color index +0.16[4][2]
B−V color index +0.35[4]
Variable type δ Sct[2]
Astrometry
Radial velocity (Rv)−45.1±0.6[5] km/s
Proper motion (μ) RA: 7.175[1] mas/yr
Dec.: 1.996[1] mas/yr
Parallax (π)16.3644 ± 0.2022 mas[1]
Distance199 ± 2 ly
(61.1 ± 0.8 pc)
Absolute magnitude (MV)0.72±0.04[6]
Details
Mass2.23+0.06
−0.05[7] M☉
Radius4.78±0.38[1] R☉
Luminosity40.0±0.6[1] L☉
Surface gravity (log g)3.5[8] cgs
Temperature6,638+277
−247[1] K
Metallicity [Fe/H]0.41[6] dex
Rotational velocity (v sin i)25.5[8] km/s
Age0.7±0.1[6] Gyr
Other designations
δ Sct, 2 Sct, BD−09°4796, FK5 1486, HD 172748, HIP 91726, HR 7020, SAO 142515[9]
Database references
SIMBADdata

Delta Scuti, Latinized from δ Scuti, is a variable star in the southern constellation Scutum. With an apparent visual magnitude that fluctuates around 4.72,[4] it is the fifth-brightest star in this small and otherwise undistinguished constellation. Analysis of the parallax measurements place this star at a distance of about 199 light-years (61 parsecs) from Earth.[1] It is drifting closer with a radial velocity of −45 km/s.[5]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference gcvs was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference pasp86_509_7 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference clpl99 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference aaa501_3_941 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference aaa418_989 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference mnras359 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).