4959 Niinoama

Niinoama

Discovery
Discovered by	Natori and Urata
Discovery site	Yakiimo
Discovery date	15 August 1991
Designations
MPC designation	4959
Alternative names	1991 PA1
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	24056 days (65.86 yr)
Aphelion	3.1667 AU (473.73 Gm)
Perihelion	3.1278 AU (467.91 Gm)
Semi-major axis	3.1472 AU (470.81 Gm)
Eccentricity	0.0061846
Orbital period	5.58 yr (2039.3 d)
Mean anomaly	37.3052°
Mean motion	0° 10^m 35.508^s / day
Inclination	9.0043°
Longitude of ascending node	128.927°
Argument of perihelion	306.938°
Earth MOID	2.14151 AU (320.365 Gm)
Jupiter MOID	1.86008 AU (278.264 Gm)
Jupiter Tisserand parameter	3.190
Physical characteristics
Mean radius	13.98 ± 1.2 km
Rotation period	4.73 h (0.197 d)
Geometric albedo	0.1082 ± 0.021
Absolute magnitude (H)	10.9

4959 Niinoama (1991 PA1) is a main-belt asteroid discovered on August 15, 1991 by Natori and Urata at Yakiimo.

Photometric observations of this asteroid collected during 2008 show a rotation period of 4.73 ± 0.01 hours with a brightness variation of 0.32 ± 0.04 magnitude.^[2]

References

1. "4959 Niinoama (1991 PA1)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 13 April 2016.
2. Carbo, Landy; et al. (July 2009), "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory and Oakley Observatory: 2008 September and October", The Minor Planet Bulletin 36 (3): 91–94, Bibcode:2009MPBu...36...91C.

External links

• JPL Small-Body Database Browser on 4959 Niinoama
• Here is a shot of asteroid Niinoama, 2.2au from Earth on 17JAN2005 from the SDSS site - Fermats Brother

• 4959 Niinoama at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters