View source for NGC 1555

{{Short description|Variable nebula in the constellation Taurus}}
{{Infobox nebula
| name = [[New General Catalogue|NGC]] 1555
| image = Ngc1555.jpg
| caption = A [[near-infrared]] image of NGC 1555
| credit = [[2MASS]]/[[NASA]]
| type = variable 
| subtype = 
| epoch = J2000.0
| ra = {{RA|4|21|57.1}}<ref name="simbad">{{cite simbad
  | title=NGC 1555
  | access-date=2007-05-01}}</ref>
| dec = {{DEC|+19|32|7}}<ref name="simbad" />
| dist_ly =
| appmag_v = 
| size_v =
| constellation  = [[Taurus (constellation)|Taurus]]
| radius_ly = 
| absmag_v = 
| notes = 
| names = Hind's Nebula,<ref name="simbad" /> [[Sharpless catalog|Sharpless]] 238, PGC 1595946
}}
'''NGC 1555''', sometimes known as '''Hind's Variable Nebula''',<ref name="interstellarum">{{cite book|last1=Stoyan|first1=Ronald|last2=Schurig|first2=Stephan|title=interstellarum Deep Sky Atlas|publisher=Cambridge University Press; Oculum-Verlag GmbH|publication-place=Erlangen|date=2014|isbn=978-1-107-50338-0|oclc=920437579|url=http://www.deep-sky-atlas.com/}}</ref> Sh2-238 or HH 155, is a [[variable nebula]] 4 light years across,<ref>{{Cite web |date=2013-11-28 |title=Hind's Variable Nebula, a variable nebula in Taurus |url=http://annesastronomynews.com/photo-gallery-ii/nebulae-clouds/hinds-variable-nebula-by-adam-block/ |access-date=2023-10-02 |website=Anne's Astronomy News |language=nl-NL}}</ref> illuminated by the star [[T Tauri]], located in the [[constellation]] [[Taurus (constellation)|Taurus]]. It is 400 light years away from [[Earth]], and has a magnitude (B)<ref>{{Cite web |title=NGC 1555 (Hind's Nebula) - Reflection Nebula in Taurus {{!}} TheSkyLive.com |url=https://theskylive.com/sky/deepsky/ngc1555-hinds-nebula-object |access-date=2023-10-02 |website=theskylive.com}}</ref> of 9.98. It is also in the second [[Sharpless catalog]] as 238. It is a [[Herbig–Haro object]].<ref>{{cite web |url=http://galaxymap.org/cgi-bin/details.py?id=21556&t=hii&s=4_p31.5xp30.5&name=S238 |title=Sh 2-238 |website=galaxymap.org |url-status=dead |archive-url=https://web.archive.org/web/20080203045415/http://galaxymap.org/cgi-bin/details.py?id=21556&t=hii&s=4_p31.5xp30.5&name=S238 |archive-date=2008-02-03}} </ref> The nebula was discovered on October 11, 1852, by [[John Russell Hind]]. 

[[Image:n1555s.jpg|thumb|upright=1.9|left|NGC 1555 from the 0.8m Schulman at the Mount Lemmon Sky Center, AZ.]]

[[File:NGC1555 VariableNebula.gif|thumb|Timelapse of variable nebula activity of NGC 1555 from October 2022 to March 2023 compiled from contributions from the big amateur telescope (https://bigamateurtelescope.com/)]]

{{clear left}}

==See also==
*[[NGC 2261]]

==References==
{{Reflist}}

==External links==
{{commons category}}
*[http://galaxymap.org/cgi-bin/details.py?id=21556&t=hii&s=4_p31.5xp30.5&name=S238 Galaxy Map Sharpless 238] {{Webarchive|url=https://web.archive.org/web/20110930102932/http://galaxymap.org/cgi-bin/details.py?id=21556&t=hii&s=4_p31.5xp30.5&name=S238 |date=2011-09-30 }}

{{Sh2 objects}}
{{Ngc20}}

[[Category:Diffuse nebulae]]
[[Category:Taurus (constellation)]]
[[Category:NGC objects|1555]]
[[Category:Sharpless objects]]
[[Category:Herbig–Haro objects]]
[[Category:Astronomical objects discovered in 1852]]