NGC 634

{{Infobox galaxy

| name = NGC 634

| image = A Perfect Spiral with an Explosive Secret.jpg

| caption = Picture created from images taken with the Wide Field Channel of Hubble's Advanced Camera for Surveys

| epoch = J2000

| constellation name = Triangulum

| ra = {{RA|01|38|18.679}}

| dec = {{DEC|+35|21|53.47}}

| z = 0.016417

| h_radial_v = {{Val|4925|u=km/s|fmt=commas}}

| gal_v =

| dist_ly = {{convert|66.55|Mpc|Mly|abbr=on|lk=on|order=flip}}

| group_cluster =

| type = Sa

| mass =

| stars =

| appmag_v = 14.0

| size_v = {{nowrap|2′.04 × 0′.55}}

| notes =

| names = MCG+06-04-048, UGC 1164, PGC 6059

}}

NGC 634 is a spiral galaxy, lying at a distance of {{convert|66.55|Mpc|Mly|abbr=off|lk=on|disp=out}} away from the Milky Way in the northern constellation of Triangulum. This object was discovered on 26 October 1876 by French astronomer Édouard Stephan.{{cite web | url = https://cseligman.com/text/atlas/ngc6.htm#634 | title = NGC{{nbsp}}634 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 26 August 2024 }} It is inclined by an angle of 82.4° to the line of sight from the Earth, and thus is being viewed nearly edge on.

Supernova SN 2006Q was reported {{Val|2.5|ul=arcsecond}} east and {{Val|1.0|u=arcsecond}} north of the galactic core in NGC 634, January 24, 2006. This was most likely a type II supernova and reached magnitude 18.74. Another supernova explosion was reported near the galaxy on January 2, 2008. It was positioned {{Val|16.6|ul=arcseconds}} west and {{Val|20.2|u=arcseconds}} north of the Galactic Center and was designated SN 2008A. This event reached a peak magnitude of 16.7 on January 3, and was determined to be a type Iax supernova.

References

{{reflist|refs=

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{{cite journal

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| volume=655 | issue=2 | pages=790–813 | date=February 2007

| doi=10.1086/510201 | arxiv=astro-ph/0610732

| bibcode=2007ApJ...655..790C | s2cid=11672751 }}

{{citation

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| last4=Huchra | first4=J. P. | last5=Mader | first5=J.

| last6=Jarrett | first6=T. H. | last7=Chester | first7=T.

| last8=Cutri | first8=R. | last9=Schneider | first9=S. E.

| title=The K-Band Galaxy Luminosity Function

| journal=The Astrophysical Journal

| volume=560 | issue=2 | pages=566–579 | date=October 2001

| doi=10.1086/322488 | bibcode=2001ApJ...560..566K

| arxiv=astro-ph/0011456 | s2cid=119420446 }}

{{cite journal

| title=Supernovae 2006Q, 2006R, 2006S

| last1=Li | first1=W. | last2=Puckett | first2=T.

| last3=Langoussis | first3=A. | last4=Gagliano | first4=R.

| journal=IAU Circular | display-authors=1

| volume=8664 | page=2 | date=January 2006

| editor1-last=Green | editor1-first=D. W. E.

| bibcode=2006IAUC.8664....2L }}

{{cite journal

| title=Supernova 2008A in NGC 634

| display-authors=1 | last1=Nakano | first1=S.

| last2=Ichimura | first2=Y. | last3=Itagaki | first3=K.

| last4=Kadota | first4=K. | last5=Hirose | first5=Y.

| journal=Central Bureau Electronic Telegrams

| volume=1193 | page=1 | date=January 2008

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| bibcode=2008CBET.1193....1N }}

{{cite journal

| title=Nearby supernova rates from the Lick Observatory Supernova Search – I. The methods and data base

| last1=Leaman | first1=Jesse | last2=Li | first2=Weidong

| last3=Chornock | first3=Ryan | last4=Filippenko | first4=Alexei V.

| display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society

| volume=412 | issue=3 | pages=1419–1440 | date=April 2011

| doi=10.1111/j.1365-2966.2011.18158.x | doi-access=free | arxiv=1006.4611

| bibcode=2011MNRAS.412.1419L | s2cid=118430231 }}

{{cite web

| title=A perfect spiral with an explosive secret

| work=Hubble Space Telescope | date=May 30, 2011

| url=https://www.spacetelescope.org/images/potw1122a/

| access-date=2020-04-03 }}

{{cite web

| url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+634&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES

| title=NED results for object NGC 0634

| publisher=National Aeronautics and Space Administration / Infrared Processing and Analysis Center

| access-date=3 February 2017 }}

}}

External links

{{Commons category-inline}}
[http://www.spacetelescope.org/images/potw1122a/ A Perfect Spiral with an Explosive Secret]: ESA/Hubble Picture of the week.

NGC 0634

0634

01164

Category:Discoveries by Édouard Stephan

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