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[[Image:Stephenson 2-18 zoomed in, 2MASS survey, 2003.png|thumb|left|upright=1.2|An image of [[Stephenson 2 DFK 1]], the brightest star at the centre of the image. Stephenson 2 DFK 49 is the very red and dim star to the upper-left of St2 DFK 1]]
In a later study from 2010, the same star was given the identifier number 11, and was grouped with a proposed cluster assumed to be associated with Stephenson 2, Stephenson 2-SW. The star showed maser emissions at some spectral lines. A later study corroborates this.<ref name="Masers">{{cite journal |last1=Verheyen |first1=L. |last2=Messineo |first2=M. |last3=Menten |first3=K.M. |title=SiO maser emission from red supergiants across the Galaxy |journal=Astronomy and Astrophysics |date=March 2012 |volume=541 |pages=A36 |doi=10.1051/0004-6361/201118265 |s2cid=55630819 |bibcode=2012A&A...541A..36V |arxiv=1203.4727 }}</ref> The study mentions a weak CO emission with radial velocities similar to Stephenson 2 DFK 49, but it is said to be unrelated due to being too intense for a red supergiant at Stephenson 2 DFK 49’s distance.<ref name="deguchi2010">{{cite journal |doi=10.1093/pasj/62.2.391 |title=SiO and H<sub>2</sub>O Maser Observations of Red Supergiants in Star Clusters Embedded in the Galactic Disk |year=2010 |last1=Deguchi |first1=Shuji |last2=Nakashima |first2=Jun-Ichi |last3=Zhang |first3=Yong |last4=Chong |first4=Selina S. N. |last5=Koike |first5=Kazutaka |last6=Kwok |first6=Sun |s2cid=24396370 |journal=[[Publications of the Astronomical Society of Japan]] |volume=62 |issue=2 |pages=391–407 |arxiv=1002.2492 |bibcode=2010PASJ...62..391D }}</ref>
Another study observed and studied 57 red supergiant stars across the galaxy and gave estimates of the stars' properties based on their [[Spectral Energy Distribution]]s, like [[luminosity]] and [[temperature]].
In 2016, it was compared to the [[yellow hypergiant]] star [[IRAS 18357-0604]],which can be found in the same general region as Stephenson 2.<ref name=clark>{{Cite journal|last1=Clark|first1=J. S.|last2=Negueruela|first2=I.|last3=González-Fernández|first3=C.|date=2014-01-01|title=IRAS 18357-0604 – An analogue of the galactic yellow hypergiant IRC +10420?|bibcode=2014A&A...561A..15C|journal=Astronomy and Astrophysics|volume=561|pages=A15|doi=10.1051/0004-6361/201322772|arxiv=1311.3956|s2cid=53372226|issn=0004-6361}}</ref>
A recent study on red supergiant mass loss rates and histories notes it as the most interesting object in the cluster, because its spectral energy distribution which has an [[infrared excess]] is similar to that of the famous and extreme red hypergiant [[VY Canis Majoris]], although Stephenson 2 DFK 49 is hotter
==Properties==
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