70 Aquarii

70 Aquarii

The visual band light curve of 70 Aquarii, adapted from Weiss (1977)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 48m 30.21043s[2]
Declination –10° 33′ 19.7143″[2]
Apparent magnitude (V) 6.19[3]
Characteristics
Evolutionary stage main sequencec
Spectral type F0 V[4]
B−V color index +0.28[3]
Variable type δ Sct[5]
Astrometry
Radial velocity (Rv)–5.8[6] km/s
Proper motion (μ) RA: +31.535[2] mas/yr
Dec.: +7.915[2] mas/yr
Parallax (π)7.6654 ± 0.0704 mas[2]
Distance425 ± 4 ly
(130 ± 1 pc)
Absolute magnitude (MV)+0.88[7]
Details
Radius4.17+0.17
−0.23[2] R☉
Luminosity44.8±0.5[2] L☉
Surface gravity (log g)3.48[7] cgs
Temperature7,314+187
−144[2] K
Metallicity [Fe/H]0.02±0.15[8] dex
Rotational velocity (v sin i)110[9] km/s
Other designations
70 Aqr, BD−11°5923, FK5 3825, HD 215874, HIP 112615, HR 8676, SAO 165308[10]
Database references
SIMBADdata

70 Aquarii is a variable star located 425[2] light years away from the Sun in the equatorial constellation of Aquarius. It has the variable star designation FM Aquarii;[7] 70 Aquarii is the Flamsteed designation. It is near the lower limit of visibility to the naked eye, appearing as a dim, yellow-white hued star with a baseline apparent visual magnitude of 6.19.[3] This star is moving closer to the Earth with a heliocentric radial velocity of –5.8 km/s.[6]

Werner Wolfgang Weiss discovered that 70 Aquarii was a variable star in 1977.[1] It was given its variable star designation in 1981.[11]

This is an F-type main-sequence star with a stellar classification of F0 V.[4] Located in the lower part of the instability strip, it is a Delta Scuti-type variable that ranges in brightness from magnitude 6.16 down to 6.19 with a period of 125 minutes (0.087 days).[5] The star has a high rate of spin, showing a projected rotational velocity of 110 km/s.[9] It has four[2] times the Sun's radius and is radiating 45[2] times the luminosity of the Sun from its photosphere at an effective temperature of around 7,314 K.[2]

  1. ^ a b Cite error: The named reference Weiss was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k l Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference mnrassa27_11 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference gcrv1953 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference aaa392_515 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference gaspar2016 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference aaa393_897 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Kholopov was invoked but never defined (see the help page).