DI Lacertae
DI Lacertae or Nova Lacertae 1910 was a nova in constellation Lacerta, announced by Thomas Henry Espinell Compton Espin on December 30, 1910.[1] It reached a brightness of 4.6 mag. Its brightness decreased in 37 days by 3 mag. Today its brightness is 14 mag.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Lacerta |
| Right ascension | 22h 35m 47.98s |
| Declination | +52° 42′ 57.7″ |
| Apparent magnitude (V) | 4.6Max. 14Min. |
| Other designations | |
HD 214239, Nova Lac 1910 | |
Recent modeling analysis of ultraviolet spectra from the Far Ultraviolet Spectroscopic Explorer and International Ultraviolet Explorer spacecraft, find the best fit for DI Lacertae to be an accretion disk with a mass accretion rate of 10−10 solar masses per year with a 30,000 Kelvin white dwarf.[2]
References
- Frost, E. B. (1911). "Observations of Nova Lacertae at the Yerkes Observatory". The Astrophysical Journal. 33: 410–417. Bibcode:1911ApJ....33..410F. doi:10.1086/141865.
- Sion, Edward M.; et al. (2017). "Far Ultraviolet Spectroscopy of Old Novae. II. RR Pic, V533 Her, and DI Lac". The Astronomical Journal. 153 (3). 109. arXiv:1701.05218. Bibcode:2017AJ....153..109S. doi:10.3847/1538-3881/153/3/109. PMID 29456254.
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