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2571 Geisei (1981 UC)
Classification: Main-belt Asteroid          SPK-ID: 2002571
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1946626967800567 3.1036e-08  
a 2.227814018818986 6.0761e-09 au
q 1.794141733991266 7.0518e-08 au
i 2.872149778310728 3.4229e-06 deg
node 66.91076283508114 6.3329e-05 deg
peri 284.69000286 6.3983e-05 deg
M 254.1567207533706 1.1601e-05 deg
tp 2459357.589936884266
(2021-May-23.08993688)
3.9996e-05 TDB
period 1214.553991461197
3.33
4.9689e-06
1.36e-08
d
yr
n .2964051022276036 1.2126e-09 deg/d
Q 2.661486303646706 7.2589e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3001  
   data-arc span      32481 days (88.93 yr)  
   first obs. used      1931-10-12  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:08:06  

Additional Information
 Earth MOID = .791217 au 
 Jupiter MOID = 2.76965 au 
 T_jup = 3.618 
[ 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 13.0   n/a MPO365276  
diameter diameter 6.582 km 0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.823 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Bohn, L.; Hibbler, B.; Stein, G.; Ditteon, R. (2015) Minor Planet Bull. 42, 89-90.]
geometric albedo albedo 0.275   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2571 Geisei (1981 UC)          Discovered 1981-Oct-23 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 UC = 1931 TA4 = 1934 NV = 1944 OD = 1961 XG = 1981 WR6 = 2016 FX5 = A911 UC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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