| Comet | C/2015 ER61 (PANSTARRS) |
|---|---|
| User | AHale |
| User`s name | Alan Hale |
| Observation's time (UT) | 2017-03-25 10:33:00 |
| Tool | 41-cm reflector |
| Observation's place | Cloudcroft |
| Magnitude | 9.9: |
| Comparison stars source | AE - Planetary magnitudes from the American Ephemeris and Nautical Almanac |
| Method | |
| Coma diameter(') | 2.1 |
| Tail's length | 5' |
| Condensation | 3/ |
| Positional angle of tail | 260 |
| Bortl's scale | Not set |
| Aperture | 40.64 cm |
| Focal length (mm) | 1828.8 |
| Type of tool | L - Newtonian reflector |
| Magnification | 70.3 |
| Field of view (°) | 0 |
| SQM-L in zenith | |
| Light pollution zone | Blue |
| Lm | |
| Comment | C/2015 ER61 moved directly over an mv ~11 star during the observation, hence the approximate brightness measurement. The tail is straight and somewhat broad. |
| Morris Format | 2017 Mar 25.44 UT: m1=9.9:, Dia.=2.1', DC=3.5, Tail: 5 arcmin, in PA 260 deg ...40.64-cm L (70.3x) ...Alan Hale (Cloudcroft, U.S.A.) |
