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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2573287116218642 1.8832e-08  
a 2.355569499005195 6.2394e-09 au
q 1.749413834690428 4.5186e-08 au
i 8.662416309224191 6.6115e-07 deg
node 321.9925178675259 6.3072e-06 deg
peri 31.89958904210512 8.0909e-06 deg
M 156.5378047177067 5.9638e-06 deg
tp 2458822.305473263726
(2019-Dec-04.80547326)
2.0663e-05 TDB
period 1320.511872501537
3.62
5.2466e-06
1.436e-08
d
yr
n .2726215549414389 1.0832e-09 deg/d
Q 2.961725163319963 7.845e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2956  
   data-arc span      26890 days (73.62 yr)  
   first obs. used      1947-10-21  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:11:52  

Additional Information
 Earth MOID = .749324 au 
 Jupiter MOID = 2.49888 au 
 T_jup = 3.494 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.28   n/a MPCxxxxx  
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. 2020-October); 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.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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

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