48P/Johnson
Infrared image of Comet Johnson taken by the Spitzer Space Telescope on 18 July 2005 | |
| Discovery | |
|---|---|
| Discovered by | Ernest Leonard Johnson |
| Discovery date | 25 August 1949 |
| Designations | |
| P/1949 Q1, P/1956 P1 | |
| |
| Orbital characteristics | |
| Epoch | 28 April 2016 (JD 2457506.5) |
| Observation arc | 5,220 days (14.29 years) |
| Number of observations | 1,612 |
| Aphelion | 5.021 AU |
| Perihelion | 2.006 AU |
| Semi-major axis | 3.514 AU |
| Eccentricity | 0.42897 |
| Orbital period | 6.587 years |
| Inclination | 12.283° |
| 111.46° | |
| Argument of periapsis | 214.69° |
| Mean anomaly | 235.39° |
| Last perihelion | 2 March 2025 |
| Next perihelion | 2031-Sep-29 |
| TJupiter | 2.931 |
| Earth MOID | 1.007 AU |
| Jupiter MOID | 0.513 AU |
| Physical characteristics | |
| Dimensions | 6.0 × 4.4 km (3.7 × 2.7 mi) |
Mean diameter | 5.74 km (3.57 mi) |
| 29 hours | |
| Comet total magnitude (M1) | 8.9 |
| Comet nuclear magnitude (M2) | 13.4 |
48P/Johnson is a periodic comet in the Solar System.
The comet's nucleus is estimated to be approximately 5.74 km (3.57 mi) in diameter, according to Lamy, Fernandez, and Weaver. David C. Jewitt and Scott S. Sheppard, however, estimate the nucleus to have dimensions of 6.0 × 4.4 km (3.7 × 2.7 mi).