5391 Emmons

Emmons

Discovery
Discovered by	E. F. Helin
Discovery site	Palomar
Discovery date	13 September 1985
Designations
MPC designation	5391
Alternative names	1985 RE2
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	23852 days (65.30 yr)
Aphelion	2.8088638 AU (420.20004 Gm)
Perihelion	1.7111712 AU (255.98757 Gm)
Semi-major axis	2.260017 AU (338.0937 Gm)
Eccentricity	0.2428505
Orbital period	3.40 yr (1241.0 d)
Mean anomaly	348.32603°
Mean motion	0° 17^m 24.333^s / day
Inclination	2.512499°
Longitude of ascending node	336.41432°
Argument of perihelion	344.83579°
Earth MOID	0.6967 AU (104.22 Gm)
Jupiter MOID	2.50448 AU (374.665 Gm)
Jupiter Tisserand parameter	3.580
Physical characteristics
Rotation period	3.028 h (0.1262 d)
Absolute magnitude (H)	13.4

5391 Emmons (1985 RE2) is a main-belt asteroid discovered on September 13, 1985 by E. F. Helin at Palomar. Its name honors Richard Emmons (1919-2005), who was a longtime professor of physics and astronomy at Kent State University and known as "Mr. Astronomy" to the thousands of children and residents who looked at the heavens through his homemade telescopes. From the 1950s to 1963, school children, Boy Scouts, church groups and community organizations visited his North Canton garage, known as the "The Star Barn," which he had converted into the area's only planetarium. It seated 38. Emmons was also an early observer of artificial satellites.

References

1. "5391 Emmons (1985 RE2)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 13 April 2016.

External links

• JPL Small-Body Database Browser on 5391 Emmons
• 5391 Emmons at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters