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Observation Notes:
I've had a horrible time finding this comet from my house and a nearby road the last few evenings. I don't have a great western horizon in this part of town. The comet had finally moved far enough south to give me a few precious moments with it before it slipped behind the trees and roofs. I found it first with my 15 x 70 binoculars from the back yard. I had to hustle to find a place where the 8-inch Dob could still see it from its lower point of view. (The sidewalk by the street worked.) The comet had a nice aqua color that was most noticeable at low power. It formed an obtuse right triangle with two other nearby stars. The core was concentrated, but the low-altitude seeing would not permit me to tell if it was stellar or not. The background of the view was filled with blue-gray twilight.
There was barely enough time to make a crude sketch before it sank out of view. I was not able to spend time estimating the visible dimensions of the coma unfortunately. I did take a few minutes to re-draw it indoors so it was a bit more presentable. This poor comet is really dropping off everyone's radar with 17P Holmes going nuts. Hopefully I'll get a couple more days to track it before it leaves us for the southern hemisphere.
Subject | C/2007 F1 (LONEOS) | |
Classification | Comet | |
Position* | Virgo: [RA: 15:07:37.6 / Dec: +00:09:41] | |
Size | Not estimated | |
Brightness* | ~ 6 vMag | |
Date/Time | October 26, 2007, 6:45 PM (October 27, 2007, 01:45 UT) | |
Observing Loc. | Flagstaff, AZ - Home | |
Instrument | Oberwerk 15 x 70 Binoculars Orion XT8 Dobsonian (203 mm dia./1200 mm F/L) | |
Eyepieces/Mag. | 25 mm Sirius Plössl (48X); 10 mm Sirius Plössl (120X) | |
Conditions | Clear, calm, twilight | |
Seeing | 2/10 Pickering | |
Transparency | ~ Mag 3.5 NELM | |
*Sources | Aerith.net; Starry Night Pro Plus 5 |
*Based on published data.