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31450 Stevepreston (1999 CU9)
Classification: Main-belt Asteroid          SPK-ID: 2031450
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2661681067132879 8.9602e-09  
a 2.394133207721853 7.9757e-09 au
q 1.756891304603116 2.0924e-08 au
i 10.74228935589921 6.7818e-07 deg
node 323.9175469992846 5.223e-06 deg
peri 18.73623599598279 6.073e-06 deg
M 154.4620872827163 3.5819e-06 deg
tp 2458619.949115326490
(2019-May-16.44911533)
1.1638e-05 TDB
period 1353.071955449676
3.70
6.7614e-06
1.851e-08
d
yr
n .2660612383177794 1.3295e-09 deg/d
Q 3.031375110840589 1.0099e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2577  
   data-arc span      19525 days (53.46 yr)  
   first obs. used      1967-10-09  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42754  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:35:39  

Additional Information
 Earth MOID = .749795 au 
 Jupiter MOID = 2.38661 au 
 T_jup = 3.458 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.20   n/a MPCxxxxx  
diameter diameter 10.625 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.4116 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pray, D.; Pravec, P.; Hornoch, K.; Vrastil, J.; et al. (2015) CBET 4157.]
[Salvaggio, F.; Marchini, A.; Papini, R. (2016) Minor Planet Bull. 43, 24-25.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 57-65.]
geometric albedo albedo 0.052   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

31450 Stevepreston           Discovered 1999 Feb. 14 by J. Broughton at Reedy Creek.
US occultation observer and skilled mathematician, Steve Preston (b. 1956), introduced asteroidal predictions of unprecedented accuracy in 2001, significantly increasing observation rates worldwide. He was elected president of the International Occultation Timing Association in 2014.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-09-25Last Updated: 2018-10-01

Alternate Designations
 1999 CU9 = 1926 PF = 1937 OA = 1967 TN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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