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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1946590600803495 1.9882e-08  
a 2.228462664250018 5.3158e-09 au
q 1.794672216602959 4.5115e-08 au
i 2.871697008295415 6.3774e-07 deg
node 66.90832780039804 1.8435e-05 deg
peri 284.6015190011752 1.783e-05 deg
M 313.5143491449812 3.4548e-06 deg
tp 2459357.399979025452
(2021-May-22.89997903)
1.2153e-05 TDB
period 1215.084470374032
3.33
4.3477e-06
1.19e-08
d
yr
n .2962756983382263 1.0601e-09 deg/d
Q 2.662253111897078 6.3506e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3038  
   data-arc span      32481 days (88.93 yr)  
   first obs. used      1931-10-12  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43995  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:57:38  

Additional Information
 Earth MOID = .789987 au 
 Jupiter MOID = 2.76921 au 
 T_jup = 3.617 
[ 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 13.08   n/a MPCxxxxx  
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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