GJ 1245
| Opazovalni podatki Epoha J2000 Enakonočje J2000 | |
|---|---|
| Ozvezdje | Labod |
| Rektascenzija | 19h 53m 54,492s |
| Deklinacija | +44° 24′ 53,41″ |
| Navidezni sij (V) | 13,41 / 14,01 / 16,75 |
| Značilnosti | |
| Spektralni razred | M5.5 / M6 / M5.5 |
| Tip spremenljivke | UV Cet[1] |
| Astrometrija | |
| Lastno gibanje (μ) | RA: 397 mas/l Dec.: −482 mas/l |
| Paralaksa (π) | 220,2 ± 1,0[2] mas |
| Oddaljenost | 14.81 ± 0.07 sv. l. (4.54 ± 0.02 pc) |
| Absolutni izsev (MV) | 15,31 / 15,72 / 18,46 |
| Podrobnosti | |
| Izsev | 0,000084 / 0,000048 L☉ |
| Starost | ~300 Ma |
| Druge oznake | |
| G 208-44: NLTT 48414, LHS 3494, 2MASS J19535443+4424541 | |
| G 208-45: NLTT 48415, LHS 3495, 2MASS J19535508+4424550 | |
| Sklici na podatkovne baze | |
| SIMBAD | The system |
| [1] | |
| [2] | |
| [3] | |
V1581 Laboda (V1581 Cygni, V1581 Cyg; G 208-44/208-45, GJ 1245) je trojni zvezdni sistem od Sonca oddaljen 14 svetlobnih let v ozvezdju Laboda. V sistemu so zvezde: G 208-44 A, G 208-44 B in G 208-45. Vse tri so precej temne z navideznimi siji: 15,31, 15,72 in 18,46. Tudi njihov absolutni izsev je manj od stotisočine Sončevega. Sistem je Osončju 37-ti znani najbližji zvezdni sistem.[3]
Sklici
[uredi | uredi kodo]- ↑ Samus, N. N.; Durlevich, O. V.; in sod. (2009). »VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)«. VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ↑ Van Altena W. F.; Lee J. T.; Hoffleit E. D. (1995). »GCTP 2835.01«. The General Catalogue of Trigonometric Stellar Parallaxes (Fourth izd.).
- ↑ »The One Hundred Nearest Star Systems«. RECONS (v angleščini). Pridobljeno 21. avgusta 2016.
Viri
[uredi | uredi kodo]- Harrington, R. S.; Dahn, C. C.; Kallarakal, V. V.; Guetter, H. H.; Riepe, B. Y.; Walker, R. L.; Pier, J. R.; Vrba, F. J.; Luginbuhl, C. B.; Harris, H. C.; Ables, H. D. (1993), »U.S. Naval Observatory photographic parallaxes - List IX«, The Astronomical Journal, 105 (4): 1571–1580, Bibcode:1993AJ....105.1571H, doi:10.1086/116537
- Henry, Todd J.; Subasavage, John P.; Brown, Misty A.; Beaulieu, Thomas D.; Jao, Wei-Chun; Hambly, Nigel C. (2004), »The Solar Neighborhood. X. New Nearby Stars in the Southern Sky and Accurate Photometric Distance Estimates for Red Dwarfs«, The Astronomical Journal, 128 (5): 2460–2473, arXiv:astro-ph/0408240, Bibcode:2004AJ....128.2460H, doi:10.1086/425052
- Smart, R. L.; Ioannidis, G.; Jones, H. R. A.; Bucciarelli, B.; Lattanzi, M. G. (2010), »Cool dwarfs stars from the Torino Observatory Parallax Program«, Astronomy and Astrophysics, 514: A84, arXiv:1003.1465, Bibcode:2010A&A...514A..84S, doi:10.1051/0004-6361/200913424
- Dittmann, Jason A.; Irwin, Jonathan M.; Charbonneau, David; Berta-Thompson, Zachory K. (2014), »Trigonometric Parallaxes for 1507 Nearby Mid-to-late M Dwarfs«, The Astrophysical Journal, 784 (2): 156, arXiv:1312.3241, Bibcode:2014ApJ...784..156D, doi:10.1088/0004-637X/784/2/156 Table with parallaxes.
