| Comet | C/1989 T1 (Helin-Roman-Alu) |
|---|---|
| User | KAM01 |
| User`s name | |
| Observation's time (UT) | 1989-10-23 19:12:00 |
| Tool | Not set |
| Observation's place | |
| Magnitude | 11.0 |
| Comparison stars source | |
| Method | - |
| Coma diameter(') | 2.5 |
| Tail's length | Not set |
| Condensation | 1 |
| 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 | 100 |
| Field of view (°) | Not set |
| SQM-L in zenith | Not set |
| Light pollution zone | |
| Lm | Not set |
| Comment | |
| Morris Format | 1989 Oct 23.8 UT: m1=11.0, Dia.=2.5', DC=1 ...20.3-cm (100x) ... (, ) |
