PK 164+31.1 (PNG 164.8+31.1, JnEr 1) Planetary Nebula in Lynx

Located at: RA 07 hours 57 minutes 52 seconds, Dec +53 degrees 25 minutes 16 seconds

Size: 6.3' Magnitude: 14.0 photographic Class: 4

North is up

West to the right

Telescope:

 8" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -25c, camera control MaxIm DL 4.56

Image:

Lumicon Red filter, 1110 minutes (111 x 10 minute subs), 02/28 & 03/1/2/3/4/6/7/8/2012; seeing 2.4-4.4 FWHM per CCDStack

Processing:

 CCDStack 2.64.4451.30003, Photoshop CS5.1

Location:

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

Notes: Shot this object at least a month to late ... I could only get from 16 to 12 subs a night before this object "set" into my north tree.

This large planetary nebula is also known as Jones-Emberson 1, and in some Atlases was misidentified at NGC 2474-5.

Note from the NGC / IC Project for NGC 2474:

Contemporary Visual Observation(s) for NGC 2474
NGC 2474 = UGC 04114 = MCG +09-13-096 = CGCG 262-052 = PGC 22321
07 57 58.9 +52 51 26
V = 13.3;  Size 0.6x0.6;  SB = 12.0

17.5": faint, very small, round, very small bright core.  Forms a double galaxy 
with N2475 just 21" NE of center.  Located 2.6' SW of a mag 8.8 SAO 26594.

13": this is the SW member of a double galaxy with N2475.  Almost stellar, 
round, faint, N2475 very close NE.

Discovered by WH (III 830).  The NGC position matches U04114 = M+09-13-096 = 
Z262-052.  Confused with the planetary JE 1 in the PK catalogue and reference 
given to the CGPN in RNGC notes.  Discussed in detail in S&T, 4/81.

- by Steve Gottlieb