3288 Seleucus
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| Discovery[1] | |
|---|---|
| Discovered by | H.-E. Schuster |
| Discovery site | La Silla Obs. |
| Discovery date | 28 February 1982 |
| Designations | |
| (3288) Seleucus | |
| Pronunciation | /sɪˈluːkəs/ |
Named after | Seleucus I Nicator (Seleucid Empire)[2] |
| 1982 DV | |
| Amor · NEO[1][3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.34 yr (12,907 days) |
| Aphelion | 2.9605 AU |
| Perihelion | 1.1053 AU |
| 2.0329 AU | |
| Eccentricity | 0.4563 |
| 2.90 yr (1,059 days) | |
| 77.175° | |
| 0° 20m 24s / day | |
| Inclination | 5.9306° |
| 218.65° | |
| 349.29° | |
| Earth MOID | 0.1029 AU · 40.1 LD |
| Physical characteristics | |
| Dimensions | 2.2 km[4] 2.49±0.07 km[5] 2.8 km (Gehrels)[1] 2.832±1.100 km[6] |
| 16 h (dated)[7] 75±5 h[8] 75 h[9] | |
| 0.139±0.127[6] 0.22 (Gehrels)[1] 0.23[4] 0.24±0.04[5] | |
| S (Tholen)[1] · K (SMASS)[1] · S[10] B–V = 0.910[1] U–B = 0.500[1] | |
| 15.2[5] · 15.3[1] · 15.5[4][10] · 15.50±0.3[6] · 15.6±0.3[8] | |
3288 Seleucus, provisional designation 1982 DV, is a rare-type stony asteroid, classified as near-Earth object of the Amor group of asteroids, approximately 2.5 kilometers in diameter. It was discovered on 28 February 1982, by German astronomer Hans-Emil Schuster at ESO's La Silla Observatory site in northern Chile.[3] It was named after the Hellenistic general and Seleucid ruler Seleucus I Nicator.[2]
Seleucus orbits the Sun in the inner main-belt at a distance of 1.1–3.0 AU once every 2 years and 11 months (1,059 days). Its orbit has an eccentricity of 0.46 and an inclination of 6° with respect to the ecliptic.[1] Seleucus has an Earth minimum orbital intersection distance of 0.1029 AU (15,400,000 km), which corresponds to 40.1 lunar distances.[1] As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation at La Silla.[3]
Physical parameters
Spectral type
On the Tholen and SMASS taxonomic scheme, Seleucus is classified as a featureless S-type and rare K-type asteroid, respectively.[1]
Rotation period
It has a relatively long rotation period of 75 hours with a brightness variation of 1.0 magnitude, indicative of a non-spheroidal shape (U=3/3).[8][9] While most minor planets have spin rate between 2 and 20 hours, Seleucus still rotates faster than a typical slow rotator, which have periods above 100 hours.
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Seleucus measures 2.49 and 2.83 kilometers in diameter, and its surface has an albedo of 0.139 and 0.24, respectively.[5][6] The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.23 and a diameter of 2.2 kilometers, based on modeled data by Alan Harris.[4][10]
Naming
This minor planet is named for Seleucus I Nicator, a general in the army of Alexander the Great, and, after the death of Alexander, founder and king of the Seleucid Empire.[2] The approved naming citation was published by the Minor Planet Center on 29 September 1985 (M.P.C. 10046).[11]
