NGC 7076 (PK 101+8.1, Abell 75) Planetary Nebula in Cepheus

Located at: RA 21 hours 26 minutes 24 seconds, Dec +62 degrees 53 minutes 33 seconds

Size: 56" Magnitude: 17.0 photographic Class: 3b

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 810 minutes (81 x 10 minute subs), 08/6/7/8/9/2013; seeing 2.9-3.7 FWHM per CCDStack

Processing:

CCDStack 2.74.4938.18664, Photoshop CS5.1

Location:

Rolling Roof Observatory, Thousand Oaks, California 91360 (+34d 13m 29s -118h 52m 20s)

Notes: Continuing imaging planetary nebulae from July into August ... seeing still not to good, although better than the last object (NGC 7048) I imaged. The faint background nebulosity is part of the very dusty Cepheus 'clouds'. I can not find a wide field deep image with NGC 7076 in it, but there are a lot of deep images of parts of Cepheus that show how dusty this region is. The little flare of light to the northwest (upper right) is from a 7.4 magnitude star just off the frame.

View 200% crop.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7076
NGC 7076 = PK 101+8.1 = Abell 75 = PN G101.8+08.7
21 26 23.6 +62 53 33
V = 14.5;  Size 67"x47"

18" (10/9/04): picked up at 73x (31 Nagler) as a fairly small (for an Abell 
planetary), fairly faint disc, perhaps 35"-40" in diameter.  Appears evenly 
illuminated at low power.  Viewed unfiltered at 160x and a couple of faint stars 
are embedded, one at the east edge and another at the north.  Only a weak 
contrast gain using the OIII filter and easier to view unfiltered at 225x.  At 
this power the shape appears irregular and brighter along the east side.  
Neither of the two stars appear to be the central as they're situated at the 
edge of the halo.  A number of 13-15th magnitude stars are in the field 
including a couple of 14th mag stars 1' and 2' N and a small, fainter trio close 
west.  Located 56' ENE of mag 2.5 Alpha Cephei (Alderamin).

17.5" (7/5/86): fairly faint at 79x using an OIII filter, slightly elongated, 
moderately large, estimate V = 13.5-13.8.  Faintly visible unfiltered.  At 222x 
two stars are superimposed; a faint star near the center (central star?) and one 
at the north edge.  On line with two mag 14 stars 1' N and 2' N.  Located 15' SE 
of mag 7.2 SAO 19386.  Identified as Abell 75 in CGPN and ESO-Strausberg 
catalogues.

This object was first recorded by WH as III 936.  His position was 7 min 54 sec 
following Alpha Cephei and 16' north.  This places it at 21 26.5 +62 51 (2000).  
Just 2' N of this position is the planetary Abell 75 which was rediscovered by 
Abell but not associated with the NGC number.  The ESO-Strausberg planetary 
catalogue also uses the Abell designation.

RNGC lists N7076 as a diffuse nebula instead of a planetary and furthermore the 
declination is 6' too far S. The ESO-Strausberg catalogue gives a precise 2000 
position 21 26 24.1 +62 53 27. I found the equivalency N7076 = Abell 75 and 
listed it in the 3rd RNGC Corrections list.

- by Steve Gottlieb