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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2194083926459953 2.7029e-08  
a 2.309827717415113 5.7626e-09 au
q 1.803032130647895 6.3641e-08 au
i 5.4905562874817 3.1646e-06 deg
node 154.9803787540634 3.4833e-05 deg
peri 164.3048274664967 3.5797e-05 deg
M 355.1940737499403 8.1399e-06 deg
tp 2459217.617581756884
(2021-Jan-03.11758176)
2.9003e-05 TDB
period 1282.235538342201
3.51
4.7984e-06
1.314e-08
d
yr
n .2807596492493438 1.0507e-09 deg/d
Q 2.816623304182331 7.0269e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2893  
   data-arc span      30817 days (84.37 yr)  
   first obs. used      1936-06-27  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43135  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:15:01  

Additional Information
 Earth MOID = .788933 au 
 Jupiter MOID = 2.50546 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 13.48   n/a E2021B10  
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. 2020-October); 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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