17 Leporis
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Lepus |
| Right ascension | 06h 04m 59.1292s[1] |
| Declination | −16° 29′ 03.965″[1] |
| Apparent magnitude (V) | 4.82 to 5.06 (combined)[2] |
| Characteristics | |
| Spectral type | A1 / M3–4.5 (spectroscopic binary)[3] |
| U−B color index | +0.12 (combined)[4] |
| B−V color index | +0.24 (combined)[4] |
| R−I color index | +0.52 (combined)[4] |
| Variable type | ZAND[2] |
| Astrometry | |
| Radial velocity (Rv) | 18.74 ± 0.10 (center of mass)[5] km/s |
| Proper motion (μ) | RA: −5.57[1] mas/yr Dec.: −3.17[1] mas/yr |
| Parallax (π) | 3.05 ± 0.67[1] mas |
| Distance | approx. 1,100 ly (approx. 330 pc) |
| Absolute magnitude (MV) | −2.6 (combined)[6] |
| Orbit[5] | |
| Period (P) | 260.34 ± 1.80 days |
| Eccentricity (e) | 0.024 ± 0.005 |
| Periastron epoch (T) | 2448528.78 ± 0.37 HJD |
| Argument of periastron (ω) (secondary) |
203.7 ± 0.4° |
| Semi-amplitude (K1) (primary) |
6.1 ± 1.0 km/s |
| Semi-amplitude (K2) (secondary) |
21.32 ± 0.21 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
17 Leporis (17 Lep, also SS Lep) is a spectroscopic binary star in the constellation of Lepus.[7] It has an overall apparent visual magnitude which varies between 4.82 and 5.06.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 * 17 Lep -- Emission-line Star, database entry, SIMBAD. Accessed on line September 9, 2009.
- ↑ 2.0 2.1 2.2 SS Lep, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 9, 2009.
- ↑ §3.1, Direct diameter measurement of a star filling its Roche lobe. The semi-detached binary SS Leporis spatially resolved with VINCI/VLTI, T. Verhoelst, E. van Aarle, and B. Acke, Astronomy and Astrophysics 470, #3 (August 2007), pp. L21–L24, doi:10.1051/0004-6361:20077840, Bibcode: 2007A&A...470L..21V.
- ↑ 4.0 4.1 4.2 HR 2148, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 9, 2009.
- ↑ 5.0 5.1 Table 2, On the nature of 17 Leporis, Alan D. Welty and Richard A. Wade, The Astronomical Journal 109, #1669 (January 1995), pp. 326–331, doi:10.1086/117276, Bibcode: 1995AJ....109..326W.
- ↑ From apparent magnitude and parallax.
- ↑ §1, Verhoelst, van Aarle, and Acke, 2007.
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