Astronomy:4332 Milton

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4332 Milton
Discovery[1]
Discovered byC. Shoemaker
Discovery sitePalomar Obs.
Discovery date5 September 1983
Designations
(4332) Milton
Named afterDaniel J. Milton[1]
(American astrogeologist)
1983 RC · 1933 SH1
1989 ET4
Minor planet categorymain-belt[1][2] · (middle)
background[3]
Orbital characteristics[2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc84.44 yr (30,841 d)
|{{{apsis}}}|helion}}3.3990 AU
|{{{apsis}}}|helion}}1.7701 AU
2.5846 AU
Eccentricity0.3151
Orbital period4.16 yr (1,518 d)
Mean anomaly107.91°
Mean motion0° 14m 13.92s / day
Inclination19.169°
Longitude of ascending node166.00°
198.38°
Physical characteristics
Mean diameter11.26 km (derived)[4]
11.500±3.014 km[5]
11.54±0.6 km[6]
Rotation period3.295±0.005 h[7]
3.2978±0.0003 h[8]
Geometric albedo0.1002±0.0708[5]
0.1158 (derived)[4]
0.2306±0.028[6]
SMASS = Xe[2] · C[9]
Absolute magnitude (H)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 ({{{1}}}).[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 ({{{1}}}).[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

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "4332 Milton (1983 RC)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=4332. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "JPL Small-Body Database Browser: 4332 Milton (1983 RC)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004332. 
  3. ↑ 3.0 3.1 "Asteroid 4332 Milton – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=4332. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 "LCDB Data for (4332) Milton". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4332%7CMilton. 
  5. ↑ 5.0 5.1 5.2 5.3 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. doi:10.3847/1538-3881/aa89ec. Bibcode: 2017AJ....154..168M. 
  6. ↑ 6.0 6.1 6.2 6.3 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. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019. 
  7. ↑ 7.0 7.1 Kabas, Afsar (June 2016). "The synodic rotational period of asteroid 4332 Milton". Icarus 271: 279–282. doi:10.1016/j.icarus.2016.02.017. Bibcode: 2016Icar..271..279K. 
  8. ↑ 8.0 8.1 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. ISSN 1052-8091. Bibcode: 2009MPBu...36..162O. 
  9. ↑ 9.0 9.1 9.2 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. 
  10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 



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