48P/Johnson

48P/Johnson
	Comet Johnson (top) by the Spitzer Space Telescope on 18 July 2005
Discovery
Discovered by	Ernest Leonard Johnson
Discovery date	25 August 1949
Designations
MPC designation	P/1949 Q1; P/1956 P1
Alternative designations	1949 II; 1956 V; 1963 IV;; 1970 IV; 1977 I; 1983 XVIII;; 1990 XXIII
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°
Longitude of; ascending node	111.46°
Argument of; periapsis	214.69°
Mean anomaly	235.39°
Last perihelion	12 August 2018
Next perihelion	2 March 2025
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)
Comet total; magnitude (M1)	8.9
Comet nuclear; magnitude (M2)	13.4

48P/Johnson is a periodic comet in the Solar System.

The comet nucleus is estimated to be 5.74 km (3.57 mi) in diameter by Lamy, Fernandez, and Weaver.^[2] Meanwhile, David C. Jewitt and Scott S. Sheppard estimate the nucleus to have dimensions of 6.0 × 4.4 km (3.7 × 2.7 mi).^[3]

References

^ "Horizons Batch for 48P/Johnson (90000566) on 2025-Mar-02" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Archived from the original on 27 June 2022. Retrieved 6 July 2023. (JPL#69 Soln.date: 2023-Mar-29)
^ ^a ^b ^c "48P/Johnson – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 1 March 2010.
^ ^a ^b D. C. Jewitt; S. S. Sheppard (2004). "The nucleus of comet 48P/Johnson". The Astronomical Journal. 127 (3): 1784–1790. Bibcode:2004AJ....127.1784J. doi:10.1086/382097.

External links

48P/Johnson at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters
48P at Kronk's Cometography
48P/Johnson – Seiichi Yoshida @ aerith.net
Lightcurve (Artyom Novichonok)

Numbered comets
Previous 47P/Ashbrook–Jackson	48P/Johnson	Next 49P/Arend–Rigaux

[Horizons2025-1] "Horizons Batch for 48P/Johnson (90000566) on 2025-Mar-02" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Archived from the original on 27 June 2022. Retrieved 6 July 2023. (JPL#69 Soln.date: 2023-Mar-29)

[jpl-2] "48P/Johnson – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 1 March 2010.

[Jewitt_2004-3] D. C. Jewitt; S. S. Sheppard (2004). "The nucleus of comet 48P/Johnson". The Astronomical Journal. 127 (3): 1784–1790. Bibcode:2004AJ....127.1784J. doi:10.1086/382097.

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