Southern Sentinel Observing Report
Thursday 15th February 2007
|Date:||15th February 2007 (Local)|
|Time:||22:30 - 00:00 NZDT (UT +13)|
|120 Minutes from Home|
Mild with a Breezy Southerly Wind. High Contrast.
Limiting Magnitude 6.0, transparency 5/5, seeing 2/5
13.1 Inch Dobsonian, TeleVue Paracorr & Eyepieces & Lumicon Filters
|Dave Ek Box and PalmDSC|
Second night out at Pauanui.
The skies were completely different compared to Tuesday night. Very breezy from the South but still mild. Setup was sheltered from the south anyway and this would mean good contrasty skies and poor seeing.
Continued to work within a box of sky either side of the celestial equator, from Gemini through to Puppis, mainly taking in Uranometria Pages 94, 95, 96, 114, 115, 116, 134, 135, 136.
Observations as follows;
|NGC 2301||Open Cluster||114x||Bright open cluster with about 80 members. Has a bright orange double star with a white companion, in the centre.|
|M 48||Open Cluster||88x||Bright large Messier open cluster. 20 members brighter than 10th Mag. About 100 stars overall. Fills the FOV.|
|NGC 2539||Open Cluster||88x||Large open cluster. Has about 50 members and has a (5th Mag) star to the E of the cluster. Even in brightness.|
|NGC 2525||Galaxy||88x||Small faint round galaxy, even in brightness, near a line of 4 stars in a straight line.|
|NGC 2440||Planetary Nebula||88x||Small round PN which is conspicuous. Just to the W of a deep orange star.|
|NGC 2438||Planetary Nebula||88x||Ring shaped planetary inside M46 on the on the NE northeastern side.|
|M 46||Open Cluster||88x||Remarkable open cluster. Over 100 stars of even brightness. Has the PN NGC2438 on the N edge.|
|M 47||Open Cluster||88x||Large bright Messier OC, with 15 stars brighter than 10th Mag and some as bright as 5th Mag. Fills the FOV of the 22mm Nagler. Over 200 stars in all.|
|NGC 2396||Open Cluster||88x||Small and sparse open cluster. Has a orange member (8th Mag) in the centre. Herschel II Object.|
|NGC 2359||Bright Nebula||88x||Duck Nebula. Nebulosity to the N and E. Very distinct and beautiful. Irregular and bright.|
|Mel 71||Open Cluster||88x||Beautiful OC near some pretty good competition. About 100 stars that get more condensed toward the centre. Not GC like but quite rich.|
|NGC 2353||Open Cluster||88x||Compact bright cluster. Has a bright (5th Mag) bluish/white star on the S edge. Has about 20 stars of equal brightness.|
|NGC 2316||Bright Nebula||88x||Small nebuolous patch to the E of a triplet of stars. Herschel II Object.|
|M 50||Open Cluster||88x||Bright Messier open cluster, has about 50 members with 5 bright (8th Mag) members.|
|NGC 2343||Open Cluster||88x||Small open cluster with about 25 members. Has a orange double star on the eastern edge of the cluster.|
|NGC 2335||Open Cluster||88x||A small cluster with 25 stars. Has one bright member a bright reddish star in the centre.|
|NGC 2327||Bright Nebula||88x||Small nebulous patch in a starry field. Part of the larger IC2177 which is too faint to be seen visually.|
|NGC 2286||Open Cluster||88x||A sparse open cluster, just a bright knot of the Milky Way. No descript really. Hard to determine what is cluster and what is background field stars.|
|NGC 1888||Galaxy||88x||Small oval (3:1) galaxy, irregular in nature. Even in brightness.|
|NGC 2089||Galaxy||88x||Small galaxy, in a line of three stars. Has a core which is quite stellar in nature. A hazy spot.|
|NGC 2106||Galaxy||88x||Small galaxy, even in brightness, tucked inside a small triangle of stars. No other detail noted.|
|M 67||Open Cluster||88x||Bright Messier OC. At least 200 members of a even brightness. Has an 8th Mag orange star on the NE edge of the cluster.|
|M 44||Open Cluster||88x||Beehive. Very large and very bright Messier OC. Easily naked eye tonight. Needs a low power telescope to fit within FOV.|
|NGC 2613||Galaxy||88x||Edge on galaxy in a starry field. A elongated oval, possibly 4:1. Hint of a dark lane.|
|NGC 3918||Planetary Nebula||88x||Very conspicious round PN in a starry field. Bright blue/green.|
|NGC 3242||Planetary Nebula||88x||Ghost of Jupiter. Round and bright, just like Jupiter. Pale blue/green in colour.|
|NGC 3055||Galaxy||88x||A murky irregular galaxy with no core of note. Slightly oval.|
|NGC 2775||Galaxy||88x||A round, bright galaxy with a sharp core. No detail noted.|
|NGC 1981||Open Cluster||88x||Bright open cluster about a degree N of M42. has about 10 stars, bluish, which are brighter than 8th Mag, and about 10 others brighter than 12th Mag. Nebulosity from nearby NGC1977, spills into the S edge of the cluster.|
|NGC 1980||Bright Nebula||88x||Nebulous patch around iota Orionis. Half a degree directly S of M42. Conspicious and has about 10 stars brighter than 10th Mag in field. Refered as a OC as well, but it seems like a grouping more than a cluster.|
|NGC 1977||Open Cluster||88x||Large nebulous region half a degree N of M42. Nebulosity surrounds 3 bright bluish stars, which include 42 & 45 Orionis. Not difficult to spot around stars, but also visible between stars. Also named as NGC1973 and NGC1975. Full designation is NGC1977. Herschel II Object.|
|NGC 1975||Bright Nebula||88x||Large nebulous region half a degree N of M42. Nebulosity surrounds 3 bright bluish stars, which include 42 & 45 Orionis. Not difficult to spot around stars, but also visible between stars. Also named as NGC1973 and NGC1975. Full designation is NGC1977.|
|NGC 1973||Bright Nebula||88x||Large nebulous region half a degree N of M42. Nebulosity surrounds 3 bright bluish stars, which include 42 & 45 Orionis. Not difficult to spot around stars, but also visible between stars. Also named as NGC1973 and NGC1975. Full designation is NGC1977.|
|NGC 3115||Galaxy||88x||Spindle Galaxy. Long (5:1) with a bright core. Very bright in a non descript field.|
|NGC 2371||Planetary Nebula||88x||An irregular PN that needs more power to get a better view. Conspicious.|
No issues with the telescope or any of the gear.
Worked the centre of the area planned, along with the Orion region around the Orion Nebula. Some of these regions are notoriously overlooked and paitence is needed to catch up with some of the lesser known objects especially around M42.
The area between Canis Major and Monoceroes is particularly rich with clusters, and nebulosity. This region needs to be revisited with OIII and UHC filters.
Packed up and inside just after midnight.
|Auckland, New Zealand|
|36° 55' 09 " South, 174° 43' 30" East|
|-- The Southern Sentinel --|