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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 | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04863618943919679 3.0548e-08  
a 2.860197043076355 9.9093e-09 au
q 2.721087957855863 8.6161e-08 au
i 1.780218901783902 4.2379e-06 deg
node 184.239926683194 0.00010317 deg
peri 248.5888191202507 0.00011309 deg
M 116.8107176083335 4.4878e-05 deg
tp 2458627.212400250603
(2019-May-23.71240025)		 0.00022063 TDB
period 1766.820203962681
4.84		 9.1818e-06
2.514e-08		 d
yr
n .2037558769095918 1.0589e-09 deg/d
Q 2.999306128296847 1.0391e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3324  
   data-arc span      32593 days (89.23 yr)  
   first obs. used      1931-10-31  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41557  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:51:34  

Additional Information
 Earth MOID = 1.73577 au 
 Jupiter MOID = 2.13267 au 
 T_jup = 3.300 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456741.5 (2014-Mar-25.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04613915504146116 3.0244e-08  
q 2.728096148850918 8.5055e-08 au
tp 2456869.731752917529
(2014-Jul-31.23175292)		 0.00023515 TDB
node 184.3584517312167 0.00010356 deg
peri 250.7135584184135 0.00011455 deg
i 1.775385607766928 4.2335e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      3324  
   data-arc span      32593 days (89.23 yr)  
   first obs. used      1931-10-31  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41557  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:51:34  

Additional Information
 Jupiter MOID = 2.13267 au 
 T_jup = 3.300 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.147131494539298E-16 -2.557039591848008E-15 -1.31497387785923E-12 2.347497417877874E-15 -2.932859930461149E-13 -1.083315294496104E-16
q -2.557039591848008E-15 7.23437566186571E-15 3.291171320291961E-12 -6.297444415528251E-15 7.36587120387978E-13 4.215572138053995E-16
tp -1.31497387785923E-12 3.291171320291961E-12 5.529558632216227E-8 -3.18629723447321E-11 1.152179134224285E-8 -1.370051278992622E-12
node 2.347497417877874E-15 -6.297444415528251E-15 -3.18629723447321E-11 1.072414436771919E-8 -1.072540189947767E-8 -2.434919854742697E-11
peri -2.932859930461149E-13 7.36587120387978E-13 1.152179134224285E-8 -1.072540189947767E-8 1.312149508013694E-8 2.405391742414619E-11
i -1.083315294496104E-16 4.215572138053995E-16 -1.370051278992622E-12 -2.434919854742697E-11 2.405391742414619E-11 1.79224214996356E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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

[ show close-approach data ]
Alternate Designations
 A923 AB = 1928 BA = 1960 WD = 1964 PQ = 1967 CN 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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