433 Eros

433 Eros
	Eros – composite image of the north polar region, with the craters Psyche above and Himeros below. The long ridge Hinks Dorsum, believed to be a thrust fault, can be seen snaking diagonally between them. The smaller crater in the foreground is Narcissus. Watters, (2011)
Discovery
Discovered by	C. G. Witt
Discovery site	Berlin Urania Obs.
Discovery date	13 August 1898
Designations
MPC designation	(433) Eros
Pronunciation	/ˈɪərɒs/
Named after	Ἔρως, Érōs
Alternative designations	1898 DQ; 1956 PC;
Minor planet category	NEO; Amor (I); Mars-crosser;
Adjectives	Erotian /ɛˈroʊʃ(i)ən/
Symbol	(astrological)
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	53.89 yr (19,683 days)
Earliest precovery date	29 October 1893
Aphelion	1.7825 AU
Perihelion	1.1334 AU
Semi-major axis	1.4579 AU
Eccentricity	0.2226
Orbital period (sidereal)	1.76 yr (643 days)
Mean anomaly	71.280°
Mean motion	0° 33m 35.64s / day
Inclination	10.828°
Longitude of ascending node	304.32°
Argument of perihelion	178.82°
Earth MOID	0.1505 AU (58.6 LD)
Mars MOID	0.2407 AU
Physical characteristics
Dimensions	16.84±0.06 km (mean diameter); 34.4 × 11.2 × 11.2 km;
Mass	(6.687±0.003)×1015 kg
Mean density	2.67±0.03 g/cm3
Synodic rotation period	5.270 h
Geometric albedo	0.25±0.06
Spectral type	S (Tholen); S (SMASS); B–V = 0.921; U–B = 0.531;
Apparent magnitude	7.0–15
Absolute magnitude (H)	11.16

433 Eros is a stony asteroid of the Amor group, and the first discovered, and second-largest near-Earth object. It has an elongated shape and a volume-equivalent diameter of approximately 16.8 kilometers (10.4 miles). Visited by the NEAR Shoemaker space probe in 1998, it became the first asteroid ever studied from its own orbit.

The asteroid was discovered by German astronomer C. G. Witt at the Berlin Observatory on 13 August 1898 in an eccentric orbit between Mars and Earth. It was later named after Eros, a god from Greek mythology, the son of Aphrodite. He is identified with the planet Venus.^[3]

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Cite error: The named reference JPLdata-2017-06-04 was invoked but never defined (see the help page).
^ "Eros". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
^ ^a ^b Schmadel, Lutz D. (2007). "(433) Eros". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 50. doi:10.1007/978-3-540-29925-7_434. ISBN 978-3-540-00238-3.
^ John Amabile (2016) Changing the Worlds: The For-Profit Plan to Mine Asteroids and Terraform Two Planets in One Human Lifetime
^ ^a ^b ^c Cite error: The named reference Yeomans-Antreas-etal-2000 was invoked but never defined (see the help page).
^ Cite error: The named reference Baer-2008 was invoked but never defined (see the help page).
^ Cite error: The named reference NEODys-Eros-2137 was invoked but never defined (see the help page).