DV Aquarii

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Template:Short description

DV Aquarii
File:DVAqrLightCurve.png
The visual band light curve of DV Aquarii, adapted from Okazaki (1985)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 5.89[3]
Characteristics
Spectral type A9 V[4]
B−V Template:Engvar Script error: No such module "val".[5]
Variable type β Lyr[6]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[7] km/s
Proper motion (μ) RA: −54.986[2] mas/yr
Dec.: −18.428[2] mas/yr
Parallax (π)11.2032±0.1015 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)1.25[5]
Orbit[8]
Period (P)1.5755 d
Eccentricity (e)0 (adopted)
Inclination (i)Script error: No such module "val".[9]°
Periastron epoch (T)2426160.50 JD
Semi-amplitude (K1)
(primary)		95.5 km/s
Details
DV Aqr Aa
Mass1.70[10] Template:Solar mass
Radius2.756[9] Template:Solar radius
LuminosityScript error: No such module "val".[11] Template:Solar luminosity
Surface gravity (log g)3.97[11] cgs
TemperatureScript error: No such module "val".[12] K
Rotational velocity (v sin i)103[11] km/s
Age679[12] Myr
DV Aqr Ab
Mass1.01[10] Template:Solar mass
Radius1.149[9] Template:Solar radius
Surface gravity (log g)4.334[9] cgs
TemperatureScript error: No such module "val".[9] K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[13]
Database references
SIMBADdata

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DV Aquarii is a binary star[10] system in the zodiac constellation of Aquarius, near the border with Capricornus. It has a peak apparent visual magnitude of 5.89,[3] which is bright enough to be visible to the naked eye. The distance can be estimated from its annual parallax shift of Script error: No such module "val".,[2] yielding a separation of 291 light years.

This is a detached eclipsing binary system of the Beta Lyrae type. The orbital period for the system is 1.5755 days and the eccentricity is unknown and probably non-zero;[8] the orbital inclination is estimated to be Script error: No such module "val"..[9] During the primary eclipse the magnitude drops to 6.25. It descends to 6.10 with the secondary eclipse (with 6.10 being brighter than 6.25).[3] The pair have been identified as candidate Herbig Ae/Be stars,[14] and catalogued as A-type shell stars.[15]

A magnitude 10.8 star with the designation HD 358087[16] is a common proper motion companion. It is located at an angular separation of Script error: No such module "val". and has 78% of the Sun's mass. If it is gravitationally bound to the main system, the orbital period is estimated to be around 611,855 years[10]

This star was a part of the obsolete constellation Norma Nilotica.Script error: No such module "Unsubst".

References

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  1. ↑ Script error: No such module "Citation/CS1".
  2. ↑ a b c d e f Template:Cite DR2
  3. ↑ a b c Script error: No such module "Citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "Citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "Citation/CS1".
  8. ↑ a b Script error: No such module "Citation/CS1".
  9. ↑ a b c d e f Script error: No such module "Citation/CS1".
  10. ↑ a b c d Script error: No such module "citation/CS1".
  11. ↑ a b c Script error: No such module "Citation/CS1".
  12. ↑ a b Script error: No such module "Citation/CS1".
  13. ↑ Template:Cite simbad
  14. ↑ Script error: No such module "Citation/CS1".
  15. ↑ Script error: No such module "Citation/CS1".
  16. ↑ Template:Cite simbad

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Template:Stars of Aquarius

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