404 Arsinoë

404 Arsinoë (from Greek Ἀρσινόη Arsĭnŏē)^[6] is a large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.

DiscoveredbyAuguste Charlois

Discoverydate20 June 1895

MPCdesignation

(404) Arsinoë

Pronunciation/ɑːrˈsɪnoʊ.iː/^[1]

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404 Arsinoë

Orbital diagram
Discovery
Discovered by	Auguste Charlois
Discovery date	20 June 1895
Designations
MPC designation	(404) Arsinoë
Pronunciation	/ɑːrˈsɪnoʊ.iː/[1]
Named after	Arsinoe
Alternative designations	1895 BY
Minor planet category	Main belt
Adjectives	Arsinoean /ˌɑːrsɪnoʊˈiːən/[2]
Orbital characteristics[3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	116.88 yr (42691 d)
Aphelion	3.10936 AU (465.154 Gm)
Perihelion	2.07791 AU (310.851 Gm)
Semi-major axis	2.59364 AU (388.003 Gm)
Eccentricity	0.19884
Orbital period (sidereal)	4.18 yr (1525.7 d)
Mean anomaly	41.5847°
Mean motion	0° 14m 9.46s / day
Inclination	14.1044°
Longitude of ascending node	92.6126°
Argument of perihelion	120.382°
Physical characteristics
Dimensions	97.71±1.5 km[3] 96.97 ± 3.01 km[4]
Mass	(3.42 ± 3.03) × 1018 kg[4]
Synodic rotation period	8.887 h (0.3703 d)
Geometric albedo	0.0461±0.001
Spectral type	C
Absolute magnitude (H)	9.01,[3] 9.11[5]

Close

It was discovered by Auguste Charlois on June 20, 1895, in Nice.