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3879 Machar (1983 QA)
Classification: Main-belt Asteroid          SPK-ID: 2003879
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2573119998391097 4.2686e-08  
a 2.355798671323175 7.7312e-09 au
q 1.749623403986691 1.0138e-07 au
i 8.660409791241708 4.9833e-06 deg
node 322.00486753583 2.6629e-05 deg
peri 31.78773081527936 2.7654e-05 deg
M 299.6284960010017 8.8265e-06 deg
tp 2458821.980339299513
(2019-Dec-04.48033930)
3.2965e-05 TDB
period 1320.704585215366
3.62
6.5013e-06
1.78e-08
d
yr
n .2725817749328818 1.3418e-09 deg/d
Q 2.961973938659659 9.7205e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1686  
   data-arc span      26267 days (71.92 yr)  
   first obs. used      1947-10-21  
   last obs. used      2019-09-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4867  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:30:34  

Additional Information
 Earth MOID = .749377 au 
 Jupiter MOID = 2.49375 au 
 T_jup = 3.494 
[ 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 13.2   n/a MPO448952  
diameter diameter 5.712 km 0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.131 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Menzies, K. (2012) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.375   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3879 Machar (1983 QA)          Discovered 1983-Aug-16 by Vavrova, Z. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1983 QA = 1947 UG = 1976 UJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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