Type Ia supernova
SN 1994D |
Event type | Supernova |
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Type Ia[1] |
Date | March 7, 1994[2] |
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Constellation | Virgo |
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Right ascension | 12h 34m 02.395s[1] |
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Declination | +07° 42′ 05.70″[1] |
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Epoch | B2000.0 |
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Distance | 55.1 ± 5.2 Mly (16.9 ± 1.6 Mpc)[3] |
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Redshift | 0.0036, 0.0001, −0.0001, 0.0021, 0.0023, 0.0022, 0.0008, 0.0005, 0.0013, 0.0017, 0.0004, 0.0024, 0.0011, 0.0012, 0.0002 |
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Host | NGC 4526[2] |
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Progenitor type | White dwarf |
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Peak apparent magnitude | +15.2 |
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Preceded by | SN 1994C[4] |
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Followed by | SN 1994E[4] |
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SN 1994D was a Type Ia supernova event in the outskirts of galaxy NGC 4526. It was offset by 9.0″ west and 7.8″ south of the galaxy center and positioned near a prominent dust lane.[1] It was caused by the explosion of a white dwarf star composed of carbon and oxygen.[5] This event was discovered on March 7, 1994 by R. R. Treffers and associates using the automated 30-inch telescope at Leuschner Observatory.[2] It reached peak visual brightness two weeks later on March 22.[5] Modelling of the light curve indicates the explosion would have been visible around March 3-4. A possible detection of helium in the spectrum was made by W. P. S. Meikle and associates in 1996.[1] A mass of 0.014 to 0.03 M☉ in helium would be needed to produce this feature.[6]