Gallery: Hartley 2
Sketch by Deirdre Kelleghan
Fig 1:
Fig 2:
Fig 3:
| Image Parameter | Details |
| Image Date (UTC): | 2010-10-12 |
| Image Time (UTC): | Fig 1: 20:45
Fig 2: 21:30 Fig 3: 21:54 |
| Seeing: | Good Bortle Dark Scale 4 |
| Sky Quality: | ??? |
| Field of View: | ??? |
| Observing Site: | Kildare, Ireland |
| Observing Equipment: | Fig 1 & 3: 16" Dob (fl=1830), 20mm eyepiece, 91x,
Fig 2: 8" Dob (fl=1200mm), 32mm eyepiece, 37x |
| Comments: | Fig 1: Double Cluster and M31 naked eye objects. Observed the nucleus as being a dull white color, not round, a bit elongated. The coma seemed to me to have an inner brighter shell surrounded by an outer almost invisible diffuse area. The coma appeared to be slightly bow shock shaped but as the coma as a whole was very non-defined, it was difficult to sketch with certainty all the detail I think I perceived (if you know what I mean?).
Fig 2: est mag 4.8, no colour visible, no nucleus visible, no tail or defined shape Fig 3: The seeing had deteriorated, the atmosphere was getting very damp, so the coma did not appear to be as visible or as bright. In both 16" sketches, stars were visible through the inner coma. South is up, stars were drifting out of the FOV bottom left of the eyepiece circle. The three stars in a row visible in both sketches are mag +11.2, +11.2, +12.2 in order running towards the comet. No green colour visible at all. All sketches were done at the eyepiece, with a white gel pen, conte and pastel on black paper. |
Table 1: Data about image.