NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC5521
![](Images/negative_NGC5521-ngcicproject.jpg)
Basic Information
Location and Magnitude
Right Ascension: 14:15:23.7
Declination: +4:24:31
Constellation: VIR
Visual Magnitude: 13.8
Historic Information
Discoverer: Herschel J.
Year of discovery: 1828
Discovery aperture: 18.3
Observational
Summary description: F, S, R, bM
Sub-type: S?
Corwin's Notes
=====
NGC 5521. Curious about the brighter star superposed just 10 arcseconds north
of the nucleus -- why didn't JH mention the star? -- I pulled up the DSS2B
image. There is another stellar image 12.2 arcseconds west-southwest of the
nucleus that does not appear on any other image I've looked at. It could be a
defect or it could be a supernova. It does not appear in the supernova lists,
though, so no one else has apparently picked it up (was NGC 5521 even on
anyone's SN search list in 1990 when the plate was taken?). The plate's date
is 15 May 1990.
The star that JH did not mention is apparently a close double; at least it
appears that way in the SDSS image. The image on the DSS2IR plate is somewhat
elongated in the correct position angle (about 315 degrees), but seeing that
image alone, I would not suspect that the star is double.
For another possible supernova, see IC 3993.
Steve's Notes
=====
NGC 5521
17.5" (6/1/02): very faint, very small, round, just 15" diameter. Appears to have a fairly sharp stellar nucleus surrounded by a small halo. Located between a mag 11.5 star 2.5' S and a similar star 5' N.