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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2193308226922326 3.8379e-08  
a 2.309305358282627 6.7025e-09 au
q 1.802803514202918 8.7591e-08 au
i 5.489954217506591 4.2852e-06 deg
node 154.9900949804954 3.5606e-05 deg
peri 164.3659478730745 3.6555e-05 deg
M 298.9767671337842 8.8279e-06 deg
tp 2459217.776713112525
(2021-Jan-03.27671311)
3.1722e-05 TDB
period 1281.800603583122
3.51
5.5804e-06
1.528e-08
d
yr
n .2808549153383627 1.2227e-09 deg/d
Q 2.815807202362337 8.1725e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2407  
   data-arc span      30535 days (83.60 yr)  
   first obs. used      1936-06-27  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46236  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:10:57  

Additional Information
 Earth MOID = .79068 au 
 Jupiter MOID = 2.50665 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-August); 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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