| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 22 September 1963 |
| Designations | |
| (2007) McCuskey | |
Named after | Sidney McCuskey (American astronomer)[2] |
| 1963 SQ · 1936 HP 1941 SW1 · 1943 EL 1947 GE · 1951 LV 1952 SB1 · 1952 UR1 1958 GB · 1963 TL 1963 VC · 1965 CA 1965 CC · 1966 OB 1969 EC1 · 1970 QD1 A921 EK | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 64.55 yr (23,576 days) |
| Aphelion | 2.6585AU |
| Perihelion | 2.1094 AU |
| 2.3839 AU | |
| Eccentricity | 0.1152 |
| 3.68yr (1,344 days) | |
| 47.384° | |
| 0° 16m 4.08s / day | |
| Inclination | 3.0420° |
| 17.043° | |
| 185.25° | |
| Physical characteristics | |
| Dimensions | 19.08±3.76 km[4] 20.21±7.11 km[5] 21.78 km(derived)[3] 23.14±0.35 km[6] 23.517±0.181 km[7] 23.97±0.49 km[8] 25.733±0.089 km[9] 33.79±1.31 km[10] 34.727±5.933 km[11] |
| 8.603±0.001h[12] 8.611±0.003 h[13] | |
| 0.023±0.004[11] 0.032±0.032[8] 0.0377±0.0067[9] 0.05±0.03[5] 0.0558(derived)[3] 0.06±0.02[4] 0.062±0.022[7] 0.063±0.002[6] | |
| C[12] · S[3] V–R =0.340±0.040[12] | |
| 11.80[6][11] · 12.0[4][9] · 12.06±0.05[3][12] · 12.1[1] · 12.32[5] · 12.45[8] | |
2007 McCuskey, provisional designation1963 SQ, is a carbonaceousasteroid from the inner regions of theasteroid belt, approximately 22 kilometers in diameter. It was discovered on 22 September 1963, by astronomers of theIndiana Asteroid Program atGoethe Link Observatory near Brooklyn, Indiana, United States.[14] The asteroid was later named after American astronomerSidney McCuskey.[2]
McCuskey is a dark asteroid that orbits the Sun in theinner main-belt at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,344 days). Its orbit has aneccentricity of 0.12 and aninclination of 3° with respect to theecliptic.[1]
In March 1921,McCuskey was first identified asA921 EK atHeidelberg Observatory. The asteroid'sobservation arc begins 12 years prior to its official discovery observation, with its identification as1951 LV atMcDonald Observatory in June 1951.[14]
McCuskey has been described as a darkC-type asteroid, compatible with the measuredcolor index and opposition/slope parameter.[12]
Measurements made with theIRAS observatory give a diameter of33.79 kilometers and ageometric albedo of0.07. By comparison, measurements withSpitzer'sMultiband ImagingPhotometer (MIPS) give a diameter of35.26 kilometers and a geometric albedo of0.03.[10]
According to the more recent 2015/16 results of theNEOWISE survey carried out by NASA'sWide-field Infrared Survey Explorer,McCuskey measures 19.08 and 20.21 kilometers in diameter and its surface has analbedo of 0.06 and 0.05, respectively.[4][5]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0558 and a diameter of 21.78 kilometers based on anabsolute magnitude of 12.06.[3]
In March 2013, a rotationallightcurve ofMcCuskey was obtained from photometric observations by an international collaboration of astronomers. Lightcurve analysis gave a well-definedrotation period of 8.603 hours with a brightness variation of 0.18magnitude (U=3). The group also determined aV–R color index of0.340.[12]
Astronomers atTexas A&M University using the 0.6-meterSARA South Telescope atCerro Tololo in August 2014, determined a concurring period of 8.611 hours with a brightness amplitude of 0.21magnitude (U=3).[13]
Thisminor planet was named in honour of American mathematician and astronomerSidney Wilcox McCuskey (1907–1979), who was the director of theWarner and Swasey Observatory and president ofIAU Commission 33,Structure and Dynamics of the Galactic System. He is best known for his contribution on stellar luminosity and galactic structure.[2] The approved naming citation was published by theMinor Planet Center on 6 June 1982 (M.P.C. 6954).[15]
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