9947 Takaishuji

9947 Takaishuji

Orbit of 9947 Takaishuji (blue), planets (red) and the Sun (black). The outermost planet visible is Jupiter.
Discovery
Discovered by	E. F. Helin
Discovery date	17 August 1990
Designations
MPC designation	9947 Takaishuji
Alternative names	(9947) 1990 QB
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	14930 days (40.88 yr)
Aphelion	2.9225373 AU (437.20536 Gm)
Perihelion	1.7424090 AU (260.66068 Gm)
Semi-major axis	2.3324731 AU (348.93301 Gm)
Eccentricity	0.252978
Orbital period	3.56 yr (1301.1 d)
Mean anomaly	9.4706450°
Mean motion	0° 16^m 36.051^s / day
Inclination	21.85536°
Longitude of ascending node	332.23139°
Argument of perihelion	56.85162°
Earth MOID	0.815677 AU (122.0235 Gm)
Jupiter MOID	2.75063 AU (411.488 Gm)
Jupiter Tisserand parameter	3.433
Physical characteristics
Dimensions	~16.2km[2]
Geometric albedo	~0.01
Surface temp. min mean max Kelvin Celsius
Absolute magnitude (H)	14.2

9947 Takaishuji is a main belt asteroid. It orbits the Sun once every 3.56 years.^[1]

Discovered on August 17, 1990 by E. F. Helin, it was given the provisional designation "1990 QB".^[3] It was later renamed 9947 Takaishuji after Shuji Takai, a Japanese schoolteacher in Kuroishi.^[4]

References

1. "9947 Takaishuji (1990 QB)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 13 April 2016.
2. Tedesco E.F.; Noah P.V.; Noah M.; Price S.D. "The supplemental IRAS minor planet survey (SIMPS)".
3. MPO 18125 Minor Planet Center
4. "Minor Planet Centre Circular 78719" (PDF).

External links

• 9947 Takaishuji at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters