sponsored by psychohistorian.org


Deep Sky Observer's Companion – the online database


Welcome, guest!

If you've already registered, please log in,

or register an observer profile for added functionality.


log in to manage your observing lists























Full database:

Entire DOCdb database of 18,816 objects.



SN 1987A (3,759 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




finder chart

altitude today

altitude (year)


½°, , in DOCdb

Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /home/yivumoo/public_html/show_object.php on line 167

Warning: fopen(/home/yivumoo/public_html/logs/showobject/20211203.txt): failed to open stream: Disk quota exceeded in /home/yivumoo/public_html/show_object.php on line 168

Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/yivumoo/public_html/show_object.php on line 181

Warning: fclose() expects parameter 1 to be resource, boolean given in /home/yivumoo/public_html/show_object.php on line 182

show browsing

SN 1987A

SN 1987A

RA: 05h 35m 28.01s
Dec: −69° 16′ 11.6″

Con: ~
Ch: MSA:496, U2:445, SA:24


(reference key)

Type: supernova remnant, S

Mag: B=?, V=?

Size: ?
PA: ?

Image gallery

Sketches  (1)

Select a sketch and click the button to view

Photos  (4)

Select a photo and click the button to view

Published comments

Tziamtzis, A. et al. (2010)

"The Outer Rings of SN 1987A". arXiv:1008.3387v1

Supernova 1987A in the Large Magellanic Cloud offered the opportunity due to its proximity to be monitored from its explosion till today. It is one of the few supernova explosions that its progenitor star had been observed prior to the explosion. The presence of the triple ring system that surrounds the debris of the explosion gives a unique opportunity to check the models of the late stages of stellar evolution. The two outermost rings are roughly three times larger than the inner ring oriented north and south of the supernova, thus forming an hour-glass structure, and the inner most ring surrounds the supernova. A possible explanation for the formation of the rings is that they were formed due to interaction from the wind of the progenitor star with gas that was released from the star at earlier stages of its evolution in the form of assymetric wind-like structure.

The ring system on SN 1987A was first detected in the form of [O III] 310 days after the explosion ... the discovery led to further observations using ground-based telescopes and with the HST. ... The outer rings [OR] have not been studied in the same detail as the ER [equatorial ring; inner ring] due to their low surface brightness. Maran et al. (2000) found that the surface brightness of the OR is only about 5-15% of that of the ER. .. The OR extend about 2.5 arcsec to the north and 2 arcsec to the south from the supernova.

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

Named DSOs

Object search

First search phrase


Second search phrase

Type of object to include:

open cluster
globular cluster
planetary nebula
bright nebula
dark nebula
galaxy cluster
asterism & stars

The Bug Report

DOCdb is still in beta-release.

Known issues, feature requests, and updates on bug fixes, are here:

> Bug Report


Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!

> Contact us


DOCdb is a free online resource that exists to promote deep sky observing.

You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.

> Find out more

Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.

Warning: Unknown: open(/tmp/sess_950b92774f6f88df9d93740a112a1b16, O_RDWR) failed: Disk quota exceeded (122) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in Unknown on line 0