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993 Moultona (A923 AB)
Classification: Main-belt Asteroid          SPK-ID: 2000993
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 .04863617661576401 2.3773e-08  
a 2.860197032179296 9.4365e-09 au
q 2.72108798416634 6.629e-08 au
i 1.780220243390063 1.5095e-07 deg
node 184.2400791503136 8.6411e-06 deg
peri 248.5886900254491 1.639e-05 deg
M 116.8106979707921 1.2611e-05 deg
tp 2458627.212499904645
(2019-May-23.71249990)
6.117e-05 TDB
period 1766.820193865575
4.84
8.7438e-06
2.394e-08
d
yr
n .2037558780740255 1.0084e-09 deg/d
Q 2.999306080192253 9.8955e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3443  
   data-arc span      32650 days (89.39 yr)  
   first obs. used      1931-10-31  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41223  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 19:04:36  

Additional Information
 Earth MOID = 1.73577 au 
 Jupiter MOID = 2.13267 au 
 T_jup = 3.300 
[ 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 11.52   n/a E2021B10  
diameter diameter 12.433 km 1.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.2712 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.315   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

993 Moultona (A923 AB)          Discovered 1923-Jan-12 by Van Biesbroeck, G. at Williams Bay
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A923 AB = 1928 BA = 1960 WD = 1964 PQ = 1967 CN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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