| Type: | penumbral |
| Date: | 18 January 1973 |
| Axis: | 1.0839° |
| Gamma: | -1.08446 |
| Magnitude: | 0.86555 |
| Saros Ser: | 143 |
| Saros No: | 16 of 73 |
| Penumbral: | 236 minutes, 33.7 seconds |
| P1: | 19:18:54.5 |
| Greatest: | 21:17:14.0 |
| P4: | 23:15:28.2 |
| Previous: | July 1972 |
| Next: | June 1973 |
A penumbral lunar eclipse took place on Thursday, January 18, 1973, the first of four lunar eclipses in 1973, the second being with a penumbral lunar eclipse on Friday, June 15, the third being with a penumbral lunar eclipse on Sunday, July 15, and the last being with a partial lunar eclipse on Monday, December 10.[1]
A lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[2] This lunar eclipse is related to two partial solar eclipses of Solar Saros 150.