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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08519795122227874 2.0313e-08  
a 3.02986259675823 1.0731e-08 au
q 2.771724511029415 6.1267e-08 au
i 10.83960851436679 9.4332e-07 deg
node 212.2098693330156 2.7467e-06 deg
peri 346.4319629014725 1.4242e-05 deg
M 71.26979025184018 1.249e-05 deg
tp 2458819.139412885004
(2019-Dec-01.63941289)
6.6703e-05 TDB
period 1926.339489372272
5.27
1.0234e-05
2.802e-08
d
yr
n .1868829466385033 9.9288e-10 deg/d
Q 3.288000682487044 1.1646e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3159  
   data-arc span      35759 days (97.90 yr)  
   first obs. used      1922-11-21  
   last obs. used      2020-10-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41791  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:46:33  

Additional Information
 Earth MOID = 1.76913 au 
 Jupiter MOID = 1.68277 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 10.61   n/a E2021B10  
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 13.305 h n/a LCDB (Rev. 2020-October); 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]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marchini, A.; Conti, M.; Vallerani, C.; Papini, R.; Salvaggio, F. (2020) Minor Planet Bull. 47, 265-267.]
[Polakis, T. (2020) Minor Planet Bull. 47, 314-321.]
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

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