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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04874599095693454 2.3333e-08  
a 2.859644428211734 9.0224e-09 au
q 2.720248226774077 6.5468e-08 au
i 1.780429737787152 1.509e-07 deg
node 184.2434186874573 8.6295e-06 deg
peri 248.3784915716726 1.605e-05 deg
M 156.9666586603744 1.2517e-05 deg
tp 2458626.356962856980
(2019-May-22.85696286)
6.0248e-05 TDB
period 1766.308181225738
4.84
8.3593e-06
2.289e-08
d
yr
n .2038149422770472 9.6458e-10 deg/d
Q 2.999040629649392 9.4622e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3825  
   data-arc span      32789 days (89.77 yr)  
   first obs. used      1931-10-31  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40029  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:13:42  

Additional Information
 Earth MOID = 1.73519 au 
 Jupiter MOID = 2.13329 au 
 T_jup = 3.300 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457198.5 (2015-Jun-25.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04736368642532494 2.3042e-08  
q 2.727651626437735 6.456e-08 au
tp 2456871.016155887008
(2014-Aug-01.51615589)
6.2308e-05 TDB
node 184.2717621096239 8.6492e-06 deg
peri 251.0601576781381 1.6817e-05 deg
i 1.776542803481843 1.509e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3825  
   data-arc span      32789 days (89.77 yr)  
   first obs. used      1931-10-31  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40029  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:13:42  

Additional Information
 Jupiter MOID = 2.13329 au 
 T_jup = 3.300 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.309352451661039E-16 -1.474965782027262E-15 -5.196631508592755E-13 3.927558783953391E-16 -1.489221112346656E-13 -2.454410930219481E-16
q -1.474965782027262E-15 4.167945006299852E-15 1.549540103872849E-12 -5.628315826270863E-16 4.377531750522557E-13 6.730488360104418E-16
tp -5.196631508592755E-13 1.549540103872849E-12 3.882335151628613E-9 -3.02760401075813E-11 8.903261061427785E-10 -2.49160533124612E-12
node 3.927558783953391E-16 -5.628315826270863E-16 -3.02760401075813E-11 7.480806823285309E-11 -8.206420788125702E-11 -4.888564593505239E-13
peri -1.489221112346656E-13 4.377531750522557E-13 8.903261061427785E-10 -8.206420788125702E-11 2.828216786059255E-10 2.875909586629185E-14
i -2.454410930219481E-16 6.730488360104418E-16 -2.49160533124612E-12 -4.888564593505239E-13 2.875909586629185E-14 2.277026738040473E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.51   n/a MPO636076  
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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