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992 Swasey (A922 VD)
Classification: Main-belt Asteroid          SPK-ID: 2000992
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08489582481620923 3.3318e-08  
a 3.027912162895158 1.1583e-08 au
q 2.770855062355142 1.0087e-07 au
i 10.84329037632292 3.9382e-06 deg
node 212.2356129190669 1.7614e-05 deg
peri 346.0390981566325 2.8605e-05 deg
M 34.23991255361358 2.1422e-05 deg
tp 2458817.461064367218
(2019-Nov-29.96106437)
0.00011477 TDB
period 1924.479705508106
5.27
1.1043e-05
3.023e-08
d
yr
n .187063547082172 1.0734e-09 deg/d
Q 3.284969263435175 1.2567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3119  
   data-arc span      35759 days (97.90 yr)  
   first obs. used      1922-11-21  
   last obs. used      2020-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41895  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:23:38  

Additional Information
 Earth MOID = 1.76922 au 
 Jupiter MOID = 1.68716 au 
 T_jup = 3.211 
[ show covariance matrix ]

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 10.6   n/a MPO473776  
diameter diameter 27.585 km 0.376 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.308 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.111   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

992 Swasey (A922 VD)          Discovered 1922-Nov-14 by Struve, O. at Williams Bay
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A922 VD = 1969 TA4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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