Back مستعر أعظم 393 Arabic SN 393 Catalan SN 393 German SN 393 Spanish SN 393 Finnish SN 393 French SN 393 Japanese SN 393 Polish SN 393 Portuguese SN 393 Swedish
 The Wěi asterism appears in the lower half of the Scorpius constellation | |
| Event type | Supernova  |
|---|---|
| Type II/Ib[1] | |
| Date | 27 February− 28 March 393 22 October− 19 November 393 CE[2] |
| Constellation | Scorpius |
| Right ascension | 17h 14m [3] |
| Declination | −39.8°[3] |
| Epoch | J2000 |
| Galactic coordinates | G347.4−00.6°[3] |
| Distance | 1 kpc (3×103 ly)[4] |
| Remnant | Shell |
| Host | Milky Way |
| Peak apparent magnitude | −1[5] |
| Other designations | SN 393 |
| Preceded by | SN 386 |
| Followed by | SN 1006 |
SN 393 is the modern designation for a probable supernova that was reported by the Chinese in the year 393 CE. An extracted record of this astronomical event was translated into English as follows:
A guest star appeared within the asterism Wěi during the second lunar month of the 18th year of the Tai-Yuan reign period, and disappeared during the ninth lunar month.
The second lunar month mentioned in the record corresponds to the period 27 February to 28 March 393 CE, while the ninth lunar month ran from 22 October to 19 November 393 CE. The bowl-shaped asterism named Wěi is formed by the tail of the modern constellation Scorpius. This asterism consists of the stars in Scorpius designated ε, μ, ζ, η, θ, ι, κ, λ and ν. The guest star reached an estimated apparent magnitude of −1 and was visible for about eight months before fading from sight,[5] whose lengthy duration suggests the source was a supernova.[6] However, a classical nova is not excluded as possibility.[7][6]
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qjras17_290was invoked but never defined (see the help page). - ^ Hoffmann, Susanne M.; Vogt, Nikolaus (2020-07-01). "A search for the modern counterparts of the Far Eastern guest stars 369 CE, 386 CE and 393 CE". Monthly Notices of the Royal Astronomical Society. 497 (2): 1419–1433. arXiv:2007.01013. Bibcode:2020MNRAS.497.1419H. doi:10.1093/mnras/staa1970.
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