[AZ-Observing] New nebula in M78 Orion
- From: Jeff Hopkins <phxjeff@xxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Mon, 9 Feb 2004 11:40:36 -0700
From a recent post in the QCUIAG list:
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Dear QCUIAG:es a new nebula has been found in M78 Orion!!!!
Jay McNeil (Paducah KY) recently noticed that a new nebula has appeared
in the region of M78 in Orion. This was observed with a small CCD camera
set-up. Passing this information along to Herbig-Haro expert Bo Reipurth
(Univ Hawaii), it has been found that the nebula has resulted from the
outburst of an embedded star behind the thick dark clouds in the region.
The event is possibly similar to eruptions of EX Lupi (prototype of the
EXor variables). Material has been submitted for an IAUC announcement,
but there is no reason follow-up observations should be delayed now that
the Moon is getting out of the way in the evening.
McNeil's Nebula (as it is being called for now) is about an arcminute
across, and is essentially a new deep-sky object---and is probably a visual
object. It is centered at roughly: 5 46 14 -00 05.8 (J2000). Those with
CCD cameras will immediately see what's going by comparing new images with
your favorite archive DSS images.
The erupting variable, which is too faint (at present) to appear in
McNeil's images, is located at the tapered southern tip of the new nebula,
and has been observed previously only from the near-IR and longward:
IRAS 05436-0007 = 2MASS J05461313-0006048: 5 46 13.14 -00 06 04.8 (J2000)
As no one just now knows when the nebula started to shine it's a good
idea to look on your old images of M78 and compare them with the
latest images you
take of the nebula.
hans-goran
P.S.
this was reported by Brian Skiff /Lowell
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Jeff Hopkins
http://www.hposoft.com/Astro/astro.html
HPO SOFT
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