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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .257155606619747 4.169e-08  
a 2.355216179833721 6.8576e-09 au
q 1.749559134387937 9.9346e-08 au
i 8.662059720132209 4.9195e-06 deg
node 321.9944558091069 2.4744e-05 deg
peri 31.85569450862446 2.5881e-05 deg
M 48.64140851432827 8.0174e-06 deg
tp 2458822.119148487066
(2019-Dec-04.61914849)
2.9068e-05 TDB
period 1320.214782138549
3.61
5.7661e-06
1.579e-08
d
yr
n .2726829034718534 1.1909e-09 deg/d
Q 2.960873225279504 8.6211e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1905  
   data-arc span      26404 days (72.29 yr)  
   first obs. used      1947-10-21  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46811  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:58:22  

Additional Information
 Earth MOID = .750257 au 
 Jupiter MOID = 2.49863 au 
 T_jup = 3.495 
[ 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-August); 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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1966-Nov-29 08:37 < 00:01 Europ 0.0449096628226981 0.0449071509603061 0.0449121746878842 6.08360672878447 6.08360668988257 2439458.858903151 0.368357783021406 126.532718479404 28.9987584037621 8.48032990726366 62630.386577121 T 31 CATAB v2.0f-lin.ifort 2020-Feb-22 16:58:36 2020-Feb-22 16:58

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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