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Delta Scuti

δ Scuti
Location of Delta Scuti (circled).
Observation data
Epoch J2000      Equinox J2000
Constellation Scutum[1]
Right ascension 18h 42m 16.42690s[2]
Declination −09° 03′ 09.1889″[2]
Apparent magnitude (V) 4.60 - 4.79[3]
Characteristics
Spectral type F2 IIIp[4]
U−B color index +0.16[5][3]
B−V color index +0.35[5]
Variable type δ Sct[3]
Astrometry
Radial velocity (Rv)−42.83±1.21[2] km/s
Proper motion (μ) RA: +7.3 mas/yr[2]
Dec.: +1.212 mas/yr[2]
Parallax (π)16.1899±0.1157 mas[2]
Distance201 ± 1 ly
(61.8 ± 0.4 pc)
Absolute magnitude (MV)0.72±0.04[6]
Details
Mass1.97–2.27[7] M☉
Radius4.07–4.25[7] R☉
Luminosity36.3–38.7[7] L☉
Surface gravity (log g)3.5[8] cgs
Temperature7,000[7] K
Metallicity [Fe/H]0.41[6] dex
Rotational velocity (v sin i)25.5[8] km/s
Age1.03–1.09[7] 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,[5] 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 200 light-years (61 parsecs) from Earth.[2] It is drifting closer with a radial velocity of −43 km/s.[2]

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  5. ^ a b c Cite error: The named reference clpl99 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference aaa501_3_941 was invoked but never defined (see the help page).
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  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).

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