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JPL Small-Body Database Browser
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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1944733085934857 4.1587e-08  
a 2.227998902163074 6.6482e-09 au
q 1.794712584116767 9.2461e-08 au
i 2.872157003608916 3.7408e-06 deg
node 66.9134846840078 8.132e-05 deg
peri 284.7366222125643 8.1918e-05 deg
M 135.5264577890761 1.1452e-05 deg
tp 2458143.209191363011
(2018-Jan-24.70919136)
3.7698e-05 TDB
period 1214.705185946249
3.33
5.4369e-06
1.489e-08
d
yr
n .2963682086526714 1.3265e-09 deg/d
Q 2.66128522020938 7.9411e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2466  
   data-arc span      31989 days (87.58 yr)  
   first obs. used      1931-10-12  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46996  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 21:41:28  

Additional Information
 Earth MOID = .7909 au 
 Jupiter MOID = 2.76641 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. 2019-January); 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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