536 Merapi

536 Merapi is a main belt asteroid orbiting the Sun. It was discovered by American astronomer George Henry Peters on May 11, 1904, from Washington, D.C.^[4]

536 Merapi

Discovery
Discovered by	George Henry Peters
Discovery site	Washington, D.C.
Discovery date	11 May 1904
Designations
MPC designation	(536) Merapi
Pronunciation	/məˈrɑːpi/
Named after	Mount Mĕrapi, West Sumatera[1]
Alternative designations	1904 OF
Adjectives	Merapian
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	111.94 yr (40885 d)
Aphelion	3.7977 AU (568.13 Gm)
Perihelion	3.1992 AU (478.59 Gm)
Semi-major axis	3.4984 AU (523.35 Gm)
Eccentricity	0.085546
Orbital period (sidereal)	6.54 yr (2390.1 d)
Mean anomaly	302.40°
Mean motion	0° 9m 2.232s / day
Inclination	19.425°
Longitude of ascending node	59.239°
Argument of perihelion	295.862°
Physical characteristics
Mean radius	75.71±4.5 km[2] 77.585 ± 1.765 km[3]
Mass	(2.61 ± 0.47) × 1019 kg[3]
Mean density	13.36 ± 2.59 g/cm3[3]
Synodic rotation period	8.78 h (0.366 d)
Geometric albedo	0.0452±0.006
Absolute magnitude (H)	8.2

Photometric observations of this asteroid at the Oakley Observatory in Terre Haute, Indiana, during 2006 gave a light curve with a period of 8.809 ± 0.008 hours and a brightness variation of 0.23 ± 0.05 in magnitude.^[5]