1685 Toro

1685 Toro
Shape model of Toro from its lightcurve
Discovery[1]
Discovered byC. A. Wirtanen
Discovery siteLick Obs.
Discovery date17 July 1948
Designations
(1685) Toro
Named after
Betulia Toro Herrick
(wife Samuel Herrick)[2]
1948 OA
NEO · Apollo[1][3]
Mars-crosser
Symbol (astrological)
Orbital characteristics[1]
Epoch 31 May 2021 (JD 2459000.5)
Uncertainty parameter 0
Observation arc72.59 yr (26,512 days)
Aphelion1.9636 AU
Perihelion0.7715 AU
1.3676 AU
Eccentricity0.4358
1.60 yr (584 days)
290.251°
Inclination9.383°
274.245°
127.207°
Earth MOID0.0507 AU · 19.7 LD
Physical characteristics
3.810±0.049 km[4]
4.1 km[5]
3.5+0.3
−0.4 km[6]
10.185±0.003 h[7]
10.1862±0.0006 h[8]
10.191±0.005 h[9]
10.195 h[10]
10.19540 h[11]
10.196 h[12]
10.199±0.003 h[13]
10.1995±0.0004 h[14]
10.203±0.003 h[15]
10.197826±0.000002 h[6]
0.247±0.049[4]
0.29[5]
0.38±0.33[16]
13.90[5][18] · 14.02±1.11[19] · 14.23[1][4]

1685 Toro (prov. designation: 1948 OA) is an asteroid and near-Earth object of the Apollo group on an eccentric orbit. It was discovered on 17 July 1948, by American astronomer Carl Wirtanen at Lick Observatory on Mount Hamilton, California.[3][20] The stony S-type asteroid has a rotation period of 10.2 hours and measures approximately 4 kilometers (2.5 miles) in diameter. It is named for Betulia Toro Herrick, wife of astronomer Samuel Herrick.[2] The Sylacauga meteorite appears to have originated from this asteroid.

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