Delta Herculis

δ Herculis
Location of δ Herculis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 17h 15m 01.9106s[1]
Declination 24° 50′ 21.135″[1]
Apparent magnitude (V) 3.126[1]
Characteristics
Spectral type A3IV[1]
U−B color index +0.7[2]
B−V color index +0.08[2]
Astrometry
Radial velocity (Rv)−40.0[1] km/s
Proper motion (μ) RA: -21.14[1] mas/yr
Dec.: -157.68[1] mas/yr
Parallax (π)43.41 ± 0.15 mas[3]
Distance75.1 ± 0.3 ly
(23.04 ± 0.08 pc)
Absolute magnitude (MV)+1.31[4]
Details
Mass2.4[5] M☉
Radius2.2[5] R☉
Luminosity38[5] L☉
Temperature9,620 ± 350[5] K
Rotational velocity (v sin i)270[6] km/s
Age370[6] Myr
Other designations
Sarin, δ Her, 65 Her, BD 25° 3221, CCDM J17151+2451A, FK5 641, GC 23294, HD 156164, HIP 84379, HR 6410, SAO 84951.
Database references
SIMBADdata

Delta Herculis (δ Herculis, abbreviated Delta Her, δ Her) is a multiple star system in the constellation of Hercules. Its light produces to us apparent magnitude 3.12, as such the third-brightest star in the large, fairly dim constellation. Based on parallax measurement taken during the Hipparcos mission, it is approximately 23.1 parsecs (75 light-years) from the Sun.

  1. ^ a b c d e f g Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference MERMILLIOD was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference LEEUWEN was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference aass85_3_1015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference KALER was invoked but never defined (see the help page).