Delta Scuti
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scutum |
| Right ascension | 18h 42m 16.42690s |
| Declination | −09° 03′ 09.1889″ |
| Apparent magnitude (V) | 4.60 - 4.79 |
| Characteristics | |
| Spectral type | F2 IIIp |
| U−B color index | +0.16 |
| B−V color index | +0.35 |
| Variable type | δ Sct |
| Astrometry | |
| Radial velocity (Rv) | −42.83±1.21 km/s |
| Proper motion (μ) | RA: +7.3 mas/yr Dec.: +1.212 mas/yr |
| Parallax (π) | 16.1899±0.1157 mas |
| Distance | 201 ± 1 ly (61.8 ± 0.4 pc) |
| Absolute magnitude (MV) | 0.72±0.04 |
| Details | |
| Mass | 1.97–2.27 M☉ |
| Radius | 4.07–4.25 R☉ |
| Luminosity | 36.3–38.7 L☉ |
| Surface gravity (log g) | 3.5 cgs |
| Temperature | 7,000 K |
| Metallicity [Fe/H] | 0.41 dex |
| Rotational velocity (v sin i) | 25.5 km/s |
| Age | 1.03–1.09 Gyr |
| Other designations | |
| δ Sct, 2 Sct, BD−09°4796, FK5 1486, HD 172748, HIP 91726, HR 7020, SAO 142515 | |
| Database references | |
| SIMBAD | data |
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, 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. It is drifting closer with a radial velocity of −43 km/s.