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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2573119936732127 4.1915e-08  
a 2.355798668477129 7.1372e-09 au
q 1.749623416398579 9.996e-08 au
i 8.660409955839036 4.9762e-06 deg
node 322.0048599001736 2.5033e-05 deg
peri 31.7877367739231 2.6173e-05 deg
M 299.6284993945322 8.0855e-06 deg
tp 2458821.980326448570
(2019-Dec-04.48032645)
3.0116e-05 TDB
period 1320.704582822047
3.62
6.0019e-06
1.643e-08
d
yr
n .2725817754268418 1.2387e-09 deg/d
Q 2.961973920555679 8.9737e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1756  
   data-arc span      26309 days (72.03 yr)  
   first obs. used      1947-10-21  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47901  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:30:33  

Additional Information
 Earth MOID = .749377 au 
 Jupiter MOID = 2.49375 au 
 T_jup = 3.494 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456356.5 (2013-Mar-05.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2573573409083741 4.1892e-08  
q 1.749535401762766 9.9859e-08 au
tp 2456183.058194068942
(2012-Sep-12.55819407)
2.6928e-05 TDB
node 322.1246410195628 2.5053e-05 deg
peri 31.98824295076273 2.6191e-05 deg
i 8.657023031398291 4.9743e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1756  
   data-arc span      26309 days (72.03 yr)  
   first obs. used      1947-10-21  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47901  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:30:33  

Additional Information
 Jupiter MOID = 2.49375 au 
 T_jup = 3.494 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.754903612073815E-15 -4.177672026221194E-15 -2.531345771647871E-13 1.172156675501764E-14 -7.647158160562005E-14 -8.586639962891412E-16
q -4.177672026221194E-15 9.971808944232524E-15 6.002496437274426E-13 -2.912355244690406E-14 1.829675714066161E-13 2.027913130486476E-15
tp -2.531345771647871E-13 6.002496437274426E-13 7.251216556708282E-10 -8.267008016481154E-12 2.161327737376176E-10 6.632124758518961E-13
node 1.172156675501764E-14 -2.912355244690406E-14 -8.267008016481154E-12 6.276664194037092E-10 -6.221001522292096E-10 1.34588249867283E-11
peri -7.647158160562005E-14 1.829675714066161E-13 2.161327737376176E-10 -6.221001522292096E-10 6.859862161589855E-10 -1.316889941533496E-11
i -8.586639962891412E-16 2.027913130486476E-15 6.632124758518961E-13 1.34588249867283E-11 -1.316889941533496E-11 2.474389644328161E-11

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

[ show close-approach data ]
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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