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.

DI Lacertae
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
  1. 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.
  2. 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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