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JPL Small-Body Database Browser
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2021 Poincare (1936 MA)
Classification: Main-belt Asteroid          SPK-ID: 2002021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 .2190835953294616 4.0174e-08  
a 2.309349353563473 7.1797e-09 au
q 1.803408794313019 9.1311e-08 au
i 5.489520445238506 4.362e-06 deg
node 154.9909454851477 3.6117e-05 deg
peri 164.3802154833702 3.7071e-05 deg
M 186.5931220015202 8.7657e-06 deg
tp 2459217.942757781751
(2021-Jan-03.44275778)
3.2038e-05 TDB
period 1281.837233719061
3.51
5.9778e-06
1.637e-08
d
yr
n .2808468895504877 1.3097e-09 deg/d
Q 2.815289912813927 8.7526e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2329  
   data-arc span      30265 days (82.86 yr)  
   first obs. used      1936-06-27  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44275  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:29:24  

Additional Information
 Earth MOID = .790413 au 
 Jupiter MOID = 2.50444 au 
 T_jup = 3.547 
[ 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 13.5   n/a MPO435716  
diameter diameter 5.043 km 0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.4056 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Ditteon, R.; Black, S.; Masner, Z.; Osborne, J.; Trent, L. (2018) Minor Planet Bull. 45, 338-340.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.365   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2021 Poincare (1936 MA)          Discovered 1936-Jun-26 by Boyer, L. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1936 MA = 1968 UQ2 = 1971 LE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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