DM Lyrae
Dwarf nova in the constellation Lyra
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DM Lyrae (DM Lyr for short) is a dwarf nova in the constellation Lyra. This binary system is composed of a primary star of unknown type, and a white dwarf companion. It erupted in 1928 and 1996 and reached about magnitude 13.[1]
Right ascension18h 58m 44.43s[2]
Declination+30° 15′ 33.0″[2]
Apparentmagnitude(V)+18 (quiet), +13.6 (burst)[2]
A visual band light curve for DM Lyrae, adapted from Nogami et al. (2003).[1] The inset plot shows the superhump variations. | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 58m 44.43s[2] |
| Declination | +30° 15′ 33.0″[2] |
| Apparent magnitude (V) | +18 (quiet), +13.6 (burst)[2] |
| Characteristics | |
| Spectral type | ? / White dwarf |
| Variable type | SU UMa[1] |
| Orbit[3] | |
| Period (P) | 0.0654092±0.000002 d |
| Periastron epoch (T) | 2,451,343.8565±0.0015 HJD |
| Semi-amplitude (K1) (primary) | 37±5 km/s |
| Details | |
| Donor star | |
| Mass | 0.095±0.022[4] M☉ |
| Radius | 0.145±0.011[4] R☉ |
| Other designations | |
| Lyr 1928, AN 250.1929, 1RXS J185845.1+301548, AAVSO 1854+30, DM Lyr[5] | |
| Database references | |
| SIMBAD | data |
