SN 1994D

SN 1994D
	Hubble Space Telescope image of SN 1994D, visible at lower left
Event type	Supernova
	Type Ia
Date	March 7, 1994
Constellation	Virgo
Right ascension	12h 34m 02.395s
Declination	+07° 42′ 05.70″
Epoch	B2000.0
Distance	55.1 ± 5.2 Mly (16.9 ± 1.6 Mpc)
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
Host	NGC 4526
Progenitor type	White dwarf
Peak apparent magnitude	+15.2
Preceded by	SN 1994C
Followed by	SN 1994E
	[edit on Wikidata]

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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]

^ ^a ^b ^c ^d ^e Cite error: The named reference Meikle_et_al_1996 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference Treffers_et_al_1994 was invoked but never defined (see the help page).
^ Cite error: The named reference Hatt_et_al_2018 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference IAU_CBAT was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Lentz_et_al_2001 was invoked but never defined (see the help page).
^ Cite error: The named reference Boyle_et_al_2017 was invoked but never defined (see the help page).

[Meikle_et_al_1996-1] Cite error: The named reference Meikle_et_al_1996 was invoked but never defined (see the help page).

[Treffers_et_al_1994-2] Cite error: The named reference Treffers_et_al_1994 was invoked but never defined (see the help page).

[Hatt_et_al_2018-3] Cite error: The named reference Hatt_et_al_2018 was invoked but never defined (see the help page).

[IAU_CBAT-4] Cite error: The named reference IAU_CBAT was invoked but never defined (see the help page).

[Lentz_et_al_2001-5] Cite error: The named reference Lentz_et_al_2001 was invoked but never defined (see the help page).

[Boyle_et_al_2017-6] Cite error: The named reference Boyle_et_al_2017 was invoked but never defined (see the help page).

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