Neptune – July 5, 2005

Observation Notes:

I finally got a confirmed sighting of Neptune. The match to the finder chart I printed, and the blue-green color were the signals I needed. While the color was strongly blueish, I detected green, which doesn’t correspond with the deep blue color of the planet, and I attribute this to a poor ability to judge various blueish colors. At 240X, it didn’t exhibit any dimension, and simply appeared as a sturdy dot. It was about 2′ NE of a star (SAO 164285). That star provided good contrast to show I was looking at a blueish (blue-greenish 🙂 object. There’s not much else to say really, other than I have now seen every planet except Pluto!

Subject Neptune
Classification Planet
Position* Capricornus [RA: 21:18:14 / Dec: -15:50:49]
Size* 2.29″ (Equatorial diameter)
Brightness* 7.85
Date/Time July 5, 2005 – 4:00 AM
(July 5, 2005 – 11:00 UT)
Observing Loc. Anderson Mesa, AZ
Instrument Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag. 32 mm Sirius Plössl (38X), 10 mm Sirius Plössl+ 2X Barlow (240X)
Conditions Clear, calm, 42°F
Seeing 3/10
Transparency Mag 5.8+ NELM
*Sources Orion’s The Sky Astronomy Software