(9978) 1994 AJ1

(9978) 1994 AJ₁

Orbit of (9978) 1994 AJ1 (blue), planets (red) and the Sun (black). The outermost planet visible is Jupiter.
Discovery
Discovered by	T. Kobayashi
Discovery date	7 January 1994
Designations
Alternative names	1989 EK4
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	9870 days (27.02 yr)
Aphelion	3.2892817 AU (492.06954 Gm)
Perihelion	2.6890044 AU (402.26933 Gm)
Semi-major axis	2.9891430 AU (447.16943 Gm)
Eccentricity	0.10041
Orbital period	5.17 yr (1887.6 d)
Mean anomaly	144.2135°
Mean motion	0° 11^m 26.573^s / day
Inclination	9.360263°
Longitude of ascending node	287.01649°
Argument of perihelion	131.18303°
Earth MOID	1.7121 AU (256.13 Gm)
Jupiter MOID	2.01295 AU (301.133 Gm)
Physical characteristics
Surface temp. min mean max Kelvin Celsius
Spectral type	C-type asteroid[2]
Absolute magnitude (H)	13.1

(9978) 1994 AJ₁ is a C-type main belt asteroid. It orbits the Sun once every 5.03 years.^[1]

Discovered on January 2, 1994, by T. Kobayashi, it was given the provisional designation 1994 AJ₁^[3]

References

1. "JPL Small-Body Database Browser: 9978 (1994 AJ1)". NASA/Jet Propulsion Laboratory. Retrieved 5 April 2016.
2. Gianluca Masi; Sergio Foglia & Richard P. Binzel. "Search for Unusual Spectroscopic Candidates Among 40313 minor planets from the 3rd Release of the Sloan Digital Sky Survey Moving Object Catalog".
3. MPO 101863 Minor Planet Center

External links

• (9978) 1994 AJ1 at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters