Southern Sentinel Observing Report
Monday 20th August 2007
|Date:||20th August 2007 (Local)|
|Time:||19:00 - 21:00 NZDT (UT +12)|
|30 Minutes from Home|
Cool, Calm. No Cloud.
Limiting Magnitude 5.5, transparency 3/5, seeing 3/5, 4/5 Later
First Quarter Moon
13.1 Inch Dobsonian, TeleVue Paracorr & Eyepieces & Lumicon Filters
Well, do I need to say anything about the weather. Useless. No observing during the July/August New Moon period. But it did clear and I did decide to go out to Kumeu, despite the nearly first quarter Moon.
Packed the car and drove out just after the rush hour traffic, but found that I had forgotten my Observatory keys. Doh. Luckly Steve was home and I was able to get in the gate.
No real goals tonight, just going to use this evening to get continue getting used to the Argo Navis.
Observations as follows;
|DUN 144||Star||98x||Equally bright double star. Tight separation.|
|DUN 146||Star||98x||Equally bright double star, one star is orange, one is white. Loose separation.|
|DUN 154||Star||98x||Double star, one star is a fraction brighter than the other, both are white. Moderate separation. In the FOV of theta Centaurus.|
|HJ 4578||Star||98x||Unequal double star, the bright star is white, the fainter one is a muted orange white. Moderate separation.|
|HJ 4600||Star||98x||Fairly equally double star, one star is orange and bit brighter, the other white. Moderate separation.|
|HJ 4601||Star||98x||Small equally bright double star. Moderate separation.|
|HJ 4614||Star||98x||Small equally bright double star.|
|NGC 104||Globular Cluster||98x||Despite being low down it the south on a moonlight night, 47 Tuc has good resolution and clarity.|
|NGC 4337||Open Cluster||98x||Small compact open cluster, fairly difficult to determine structure due to the Moon glow. Tucked next to a line of 3 10th Mag stars. Nice equally bright yellow double in the FOV.|
|NGC 4349||Open Cluster||98x||Fairly large loose open cluster. 100 to 120 members. Has a bright star in the field on the W side.|
|NGC 5286||Globular Cluster||98x||Brightish, partially resolved globular cluster. Moderately condensed, possibly Type 5 globular.|
|NGC 5927||Globular Cluster||98x||Bright compact globular cluster, partially resolved. Rather loose in structure. On the Lupus / Norma border.|
|NGC 5946||Globular Cluster||98x||Small compact globular cluster, in a very starry field.|
|NGC 5986||Globular Cluster||98x||Bright, partially resolved, globular cluster. Fairlt loose concentration. Has a 7th Mag star just to the E.|
|NGC 6352||Globular Cluster||98x||Globular cluster in Ara. Farly large and very loose, contrast does affect this object.|
|NGC 6362||Globular Cluster||98x||Bright southern globular on it's way to being resolved. Loose but rich. In Ara, but well south of the Ara Asterism. In a notch of Ara, between Triangulum Australe and Pavo on the border with Apus. I never remember this object.|
|NGC 6752||Globular Cluster||98x||Quick look at the Pavo Glob. Good resolution here as well. Largely unaffected by the moon.|
|M 27||Planetary Nebula||98x||Good look at the Dumbell, well defined despite moonlight.|
|M 57||Planetary Nebula||98x||First good look at the Ring for this year. Good resolution, needs a better night and a little more height.|
|M 71||Globular Cluster||98x||Compact Messier globular cluster, nearly resolved and loose. In a profusely starry field.|
|Jupiter||Planet||98x||Had a look at Jupiter, good detail in the bands. No Jovian phenomena tonight. All four moons were visible. Used the variable polariser to cut glare. Works very well.|
Nice crisp view of the Moon tonight. Phase is just about 1st Quarter, with the terminator at about 6 deg E.
Most of the detail noted is on Page 34 of Rukl. Manilius crater was experiencing glancing light at dawn, giving a real 3D effect. Also in the same region is extensive rilles, Hyginus and Ariadaeus.Image below shows area observed.
Had a good two hours out. All systems worked well.
Had a look at a few double stars in Centaurus, until I got bored of those (pretty quickly) and moved onto some open clusters in Crux and some southern globulars. Nothing serious. Had a look at some northern Messier objects as well. To finish with it was nice to have a good look at the Moon as well. Some excellent detail. Anything faint like galaxies etc were just not much chop.
Dave Moorhouse turned up at just before 9PM, by then I was looking at the Moon and Jupiter through the Variable Polarising Filter.
Packed up and was on the road home by 9:15 PM.
|13.1" f5 Reflector with Argo Navis|
|Auckland, New Zealand|
|36° 55' 09 " South, 174° 43' 30" East|
|-- The Southern Sentinel --|