Two little and weak probably NP StDr 167 & 174 (Los_Calvos)

Celestial hemisphere: Southern · Constellation: Triangulum Australe (TrA) · Contains: HD142999 · HD143249 · HD143526 · HD143660

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Two little and weak probably NP StDr 167 & 174

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Two little and weak probably NP StDr 167 & 174

2 small and weak possible NP : StDr 167 & 174 Xavier Strotner and Marcel Drechsler discovered 2 possible NPs located in the Triangulum Australe.We tried to image them, they are very weak since they do not appear at all on 20-minute narrowband brutes. After 30 hours in Ha and OIII it is possible to see them appear, the 2 are very close.StDr 167 is a confirmed NP (PN-G: 323.3-06.9) for which a spectrum has already been performed by Pascal Le Dû, it has a diameter of 1.2 arc minutes. It has a crenulated circle shape and is only visible in OIIIStDr 174 is larger but more diffuse and it emits in HA and OIII the resultant makes it appear bluish-grey and does not have a really well-defined shape (like streaks). Since it is very weak, no spectrum has yet been made to confirm its nature. Its approximate size is 7.5 x 5 arc minutes.We present you the complete field, with a starless crop in version B to better identify them. The treatment was not easy and we chose not to overtreat in order to keep them looking "natural".

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B

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Status	Advanced success
Started	...
Astrometry.net job	8700825
PixInsight job	4AQKNT1OY11CH2CZ8C2RBGSBWXZURDJI
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h02m36s.44
RA (top/left)	15h59m37s.81
RA (top/right)	16h05m26s.81
RA (bottom/right)	16h05m30s.42
RA (bottom/left)	15h59m49s.78

Dec (center)	-61°58′35″.4
Dec (top/left)	-62°21′02″.5
Dec (top/right)	-62°21′47″.6
Dec (bottom/right)	-61°35′57″.2
Dec (bottom/left)	-61°35′06″.6

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Two little and weak probably NP StDr 167 & 174

Two little and weak probably NP StDr 167 & 174

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Two little and weak probably NP StDr 167 & 174

Two little and weak probably NP StDr 167 & 174

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