HOPS 383
{{sky|5|35|29.81|−|4|59|51.1|1400}}
{{Starbox begin}}
{{Starbox image|
image=250px
|caption=Infrared images from instruments at Kitt Peak National Observatory (left) and NASA's Spitzer Space Telescope document the outburst of HOPS 383, a young protostar in the Orion star-formation complex. The background is a wide view of the region taken from a Spitzer four-color infrared mosaic.
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{{Starbox observe
| epoch = J2000.0
| constell = Orion
| ra = {{RA|5|35|29.81}}
| dec = {{DEC|−4|59|51.1}}
}}
{{Starbox character
| type = Class 0 protostar
}}
{{Starbox astrometry
| dist_ly = 1,400
| dist_pc = 420
}}
{{Starbox catalog
| names = HOPS 383
}}
{{Starbox reference
| Simbad = HOPS+383
| ARICNS =
| NSTED =
| EPE =
}}
{{Starbox end}}
HOPS 383 is a Class 0 protostar. It is the first Class 0 protostar discovered to have had an outburst,{{cite news |url= https://www.sciencedaily.com/releases/2015/03/150324183632.htm |title= NASA satellites catch 'growth spurt' from newborn protostar |date= 24 March 2015 |publisher= Science Daily }} and as of 2020, the youngest protostar known to have had an outburst. The outburst, discovered by the Herschel Orion Protostar Survey (HOPS) team, was first reported in February 2015 in The Astrophysical Journal Letters.{{cite news |title= NRL Astrophysicist Explores Star Formation in Orion's Belt |first=Donna |last=McKinney |date= 2015-02-25 |publisher= United States Naval Research Laboratory |url=https://www.nrl.navy.mil/Media/News/Article/2539366/nrl-astrophysicist-explores-star-formation-in-orions-belt/ |access-date=2022-06-24}}
Observations
= Outburst =
HOPS 383 had an outburst between 2004 and 2006 (a "dramatic mid-infrared brightening"); the increase in magnitude was detectable at the 24 μm (35 times increase) and 4.5 μm, and was also detectable at the submillimetre.{{Cite journal |last1=Safron |first1=Emily J. |last2=Fischer |first2=William J. |last3=Megeath |first3=S. Thomas |last4=Furlan |first4=Elise |last5=Stutz |first5=Amelia M. |last6=Stanke |first6=Thomas |last7=Billot |first7=Nicolas |last8=Rebull |first8=Luisa M. |last9=Tobin |first9=John J. |last10=Ali |first10=Babar |last11=Allen |first11=Lori E.|author11-link=Lori Allen (astronomer) |last12=Booker |first12=Joseph |last13=Watson |first13=Dan M. |last14=Wilson |first14=T. L. |title=Hops 383: An Outbursting Class 0 Protostar in Orion |date=2015-02-10 |url=https://www.osti.gov/biblio/22364255 |journal=The Astrophysical Journal Letters |volume=800 |issue=1 |pages=L5 |doi=10.1088/2041-8205/800/1/L5 |bibcode=2015ApJ...800L...5S |osti=22364255 |s2cid=45127705 |issn=2041-8205|doi-access=free |hdl=1887/48742 |hdl-access=free }}{{Rp|2}} After 6 years, observations showed no signs of fading.{{Rp|1}}
= X-Ray =
The Chandra X-Ray Observatory detected an X-ray flare from HOPS 383 in December 2017.{{Cite web|title=Chandra :: Photo Album :: HOPS 383 :: June 18, 2020|url=https://chandra.harvard.edu/photo/2020/hops383/|access-date=2021-12-29|website=chandra.harvard.edu}} This was the first detection of X-rays from a Class 0 protostar that will evolve into a sun-like star. The flare lasted 3 hours and 20 minutes.{{Cite web|title=Chandra Press Room :: X-rays From a Newborn Star Hint at Our Sun's Earliest Days :: 18 June 2020|url=https://chandra.harvard.edu/press/20_releases/press_061820.html|access-date=2021-12-30|website=chandra.harvard.edu}} It significantly impacted the previously-thought timeline for when such events occur in the evolution of a protostar. Furthermore, it has improved astronomers' understanding of the Sun's earlier evolutionary stages.