17 Leporis

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Template:Short description

17 Leporis
File:SSLepLightCurve.png
A light curve for SS Leporis, plotted from Hipparcos data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lepus
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 4.82 to 5.06[3]
Characteristics
Spectral type A1V + M6III[4]
U−B Template:Engvar +0.12 (combined)[5]
B−V Template:Engvar +0.24 (combined)[5]
R−I Template:Engvar +0.52 (combined)[5]
Variable type Z And[3]
Astrometry
Radial velocity (Rv)Script error: No such module "val".
(center of mass)[6] km/s
Proper motion (μ) RA: −5.955[2] mas/yr
Dec.: −3.680[2] mas/yr
Parallax (π)3.5742±0.0992 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Orbit[6]
Period (P)Script error: No such module "val".
Semi-major axis (a)Script error: No such module "val".[4]
Eccentricity (e)Script error: No such module "val".[4]
Inclination (i)Script error: No such module "val".[4]°
Longitude of the node (Ω)Script error: No such module "val".[4]°
Periastron epoch (T)Script error: No such module "val".
Argument of periastron (ω)
(secondary)		Script error: No such module "val".°
Semi-amplitude (K1)
(primary)		Script error: No such module "val". km/s
Semi-amplitude (K2)
(secondary)		Script error: No such module "val". km/s
Details
A-type star
MassScript error: No such module "val".[4] Template:Solar mass
Radius18[7] Template:Solar radius
Luminosity1,900[7] Template:Solar luminosity
Surface gravity (log g)2.0[7] cgs
Temperature9,000[7] K
M giant
MassScript error: No such module "val".[4] Template:Solar mass
RadiusScript error: No such module "val".[4] Template:Solar radius
Luminosity1,200[7] Template:Solar luminosity
Surface gravity (log g)1.0[7] cgs
Temperature3,250[7] K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[8]
Database references
SIMBADdata

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17 Leporis is a binary star system in the southern constellation of Lepus.[7] It has an overall apparent visual magnitude which varies between 4.82 and 5.06,[3] making it luminous enough to be visible to the naked eye as a faint star. The variable star designation for this system is SS Leporis, while 17 Leporis is the Flamsteed designation. Parallax measurements yield a distance estimate of around 910 light years from the Sun. The system is moving further away from the Earth with a heliocentric radial velocity of +18.7 km/s.[6]

This is a double-lined spectroscopic binary system with an orbital period of 260 days and an eccentricity of 0.005.[6] The spectrum reveals the pair to consist of an A-type main-sequence star with a stellar classification of A1 V, and a red giant with a class of M6III. The close pair form a symbiotic binary with ongoing mass transfer from the giant to the hotter component. The giant does not appear to be filling its Roche lobe, so the mass transfer is coming from stellar wind off the giant. The pair are surrounded by a shell and a dusty circumbinary disk, with the former obliterating the lines from the A-type star.[4]

Gallery

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References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b c Script error: No such module "citation/CS1".
  4. ↑ a b c d e f g h i Script error: No such module "Citation/CS1".
  5. ↑ a b c Script error: No such module "citation/CS1".
  6. ↑ a b c d Script error: No such module "Citation/CS1". Seet Table 2.
  7. ↑ a b c d e f g h Script error: No such module "Citation/CS1".
  8. ↑ Template:Cite simbad

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Template:Stars of Lepus

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