Observation catalog of C/1989 T1 (Helin-Roman-Alu)
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There are 2 observations of this comet
| User | Observation's time (UT) | Magnitude | Coma diameter(') | Condensation | Tool | ||
|---|---|---|---|---|---|---|---|
| . | 1989-10-23 19:12:00 | 11.0 | 2.5 | 1 | 20.3T (100x) |  | |
| Hasubick W. | 1989-10-22 18:57:00 | 11.0 | 2.9 | 3 | 20.3T (51x) | |
