313 Chaldaea

313 Chaldaea is a large Main belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.^[2] It was discovered by Johann Palisa on 30 August 1891 in Vienna. It was named in honor of the Chaldeans, considered the founders of astrology.^[3]

313 Chaldaea

Orbital diagram
Discovery
Discovered by	Johann Palisa
Discovery date	30 August 1891
Designations
MPC designation	(313) Chaldaea
Pronunciation	/kælˈdiːə/[1]
Named after	Chaldea
Minor planet category	Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	122.79 yr (44849 d)
Aphelion	2.8054 AU (419.68 Gm)
Perihelion	1.9456 AU (291.06 Gm)
Semi-major axis	2.3755 AU (355.37 Gm)
Eccentricity	0.18096
Orbital period (sidereal)	3.66 yr (1337.3 d)
Mean anomaly	262.291°
Mean motion	0° 16m 9.084s / day
Inclination	11.654°
Longitude of ascending node	176.640°
Argument of perihelion	316.013°
Physical characteristics
Dimensions	96.34±1.7 km
Synodic rotation period	8.392 h (0.3497 d)
Geometric albedo	0.0524±0.002
Spectral type	C
Absolute magnitude (H)	8.90

In 2003, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.07 AU. The resulting data yielded an effective diameter of 96 ± 14 km.^[4]