| Comet | C/1991 A2 (Arai) |
|---|---|
| User | HAS02 |
| User`s name | Werner Hasubick |
| Observation's time (UT) | 1991-01-09 19:55:00 |
| Tool | Not set |
| Observation's place | |
| Magnitude | 10.7 |
| Comparison stars source | |
| Method | S - Sidgwick`s method |
| Coma diameter(') | 2.8 |
| Tail's length | Not set |
| Condensation | 2 |
| Positional angle of tail | Not set |
| Bortl's scale | Not set |
| Aperture | 20.3 cm |
| Focal length (mm) | 0 |
| Type of tool | T - Schmidt-Cassegrain reflector |
| Magnification | 51 |
| Field of view (°) | Not set |
| SQM-L in zenith | Not set |
| Light pollution zone | |
| Lm | Not set |
| Comment | |
| Morris Format | 1991 Jan 9.83 UT: m1=10.7, Dia.=2.8', DC=2 ...20.3-cm (51x) ...Werner Hasubick (, ) |
