| Discovery [1] | |
|---|---|
| Discovered by | C. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 5 September 1983 |
| Designations | |
| (4332) Milton | |
Named after | Daniel J. Milton
[1] (American astrogeologist) |
| 1983 RC · 1933 SH1 1989 ET4 | |
|
main-belt
[1]
[2] · (
middle) background [3] | |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 ( JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.44 yr (30,841 d) |
| Aphelion | 3.3990 AU |
| Perihelion | 1.7701 AU |
| 2.5846 AU | |
| Eccentricity | 0.3151 |
| 4.16 yr (1,518 d) | |
| 107.91 ° | |
| 0° 14m 13.92s / day | |
| Inclination | 19.169° |
| 166.00° | |
| 198.38° | |
| Physical characteristics | |
Mean diameter | 11.26
km (derived)
[4] 11.500±3.014 km [5] 11.54±0.6 km [6] |
| 3.295±0.005
h
[7] 3.2978±0.0003 h [8] | |
| 0.1002±0.0708
[5] 0.1158 (derived) [4] 0.2306±0.028 [6] | |
| SMASS = X e [2] · C [9] | |
| 11.9
[6] 12.7 [4] 12.73 [5] [9] 12.8 [2] | |
4332 Milton, provisional designation 1983 RC, is a background asteroid from the central regions of the asteroid belt, approximately 11 kilometers (7 miles) in diameter. It was discovered on 5 September 1983, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. [1] The X e-subtype has a rotation period of 3.3 hours. [4] It was named after Daniel Milton, American geologist with the USGS. [1]
Orbit and classification
Milton is a non- family asteroid from the main belt's background population. [3] It orbits the Sun in the central asteroid belt at a distance of 1.8–3.4 AU once every 4 years and 2 months (1,518 days; semi-major axis of 2.58 AU). Its orbit has an eccentricity of 0.32 and an inclination of 19 ° with respect to the ecliptic. [2]
The asteroid was first observed as 1933 SH1 at Heidelberg Observatory in September 1933. The body's observation arc begins with its official discovery observation at Palomar in September 1983. [1]
Physical characteristics
In the SMASS classification, Milton is a Xe-subtype that transitions between the X-type and E-type asteroids. [2] It has also been characterized as a carbonaceous C-type by Pan-STARRS' large-scale survey. [9]
Rotation period
In September 2008, a rotational lightcurve of Milton was obtained from photometric observations by Julian Oey at the Kingsgrove ( E19) and Leura ( E17) observatories. Lightcurve analysis gave a rotation period of 3.2978 hours with a brightness variation of 0.30 magnitude ( U=2+). [8] In August 2012, a refined period of 3.295 hours and an amplitude of 0.16 magnitude was measured by Afşar Kabaş at the Çanakkale University Observatory in Turkey ( U=3-). [7]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Milton measures between 11.500 and 11.54 kilometers in diameter and its surface has an albedo between 0.1002 and 0.2306. [5] [6]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1158 and a diameter of 11.26 kilometers based on an absolute magnitude of 12.7. [4]
Only one brief stellar occultation by 4332 Milton has been observed to date, in 2021.
Naming
This minor planet was named after Daniel J. Milton (1934-2024), American geologist with the United States Geological Survey, known for his geological studies of the Moon and Mars, as well as for research on impact craters and features in Australia. [1] The official naming citation was published by the Minor Planet Center on 30 January 1991 ( M.P.C. 17656). [10]
References
- ^ a b c d e f g "4332 Milton (1983 RC)". Minor Planet Center. Retrieved 27 April 2018.
- ^ a b c d e f "JPL Small-Body Database Browser: 4332 Milton (1983 RC)" (2018-02-23 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2018.
- ^ a b "Asteroid 4332 Milton – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
- ^ a b c d e "LCDB Data for (4332) Milton". Asteroid Lightcurve Database (LCDB). Retrieved 27 April 2018.
- ^ a b c d Masiero, Joseph R.; Nugent, C.; Mainzer, A. K.; Wright, E. L.; Bauer, J. M.; Cutri, R. M.; et al. (October 2017). "NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos". The Astronomical Journal. 154 (4): 10. arXiv: 1708.09504. Bibcode: 2017AJ....154..168M. doi: 10.3847/1538-3881/aa89ec.
- ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. Retrieved 22 October 2019.
- ^ a b Kabas, Afsar (June 2016). "The synodic rotational period of asteroid 4332 Milton". Icarus. 271: 279–282. Bibcode: 2016Icar..271..279K. doi: 10.1016/j.icarus.2016.02.017.
- ^ a b Oey, Julian (October 2009). "Lightcurve Analysis of Asteroids from Leura and Kingsgrove Observatory in the Second Half of 2008". The Minor Planet Bulletin. 36 (4): 162–164. Bibcode: 2009MPBu...36..162O. ISSN 1052-8091.
- ^ a b c Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 – Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762. Bibcode: 2015Icar..261...34V. doi: 10.1016/j.icarus.2015.08.007. S2CID 53493339.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 27 April 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form ( info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 4332 Milton at AstDyS-2, Asteroids—Dynamic Site
- 4332 Milton at the JPL Small-Body Database
