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30781 (1988 CR2)
Classification: Main-belt Asteroid          SPK-ID: 2030781
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1244455999988407 3.9585e-08  
a 2.342820210724449 8.7752e-09 au
q 2.051266543911435 9.1733e-08 au
i 6.520645487563905 3.5265e-06 deg
node 115.0185072650483 3.6116e-05 deg
peri 247.945833437741 3.8456e-05 deg
M 167.8006789275246 1.447e-05 deg
tp 2458589.982548596019
(2019-Apr-16.48254860)
5.1659e-05 TDB
period 1309.805680824223
3.59
7.359e-06
2.015e-08
d
yr
n .2748499302380963 1.5442e-09 deg/d
Q 2.634373877537463 9.8672e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1591  
   data-arc span      12093 days (33.11 yr)  
   first obs. used      1988-02-11  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51363  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:31  

Additional Information
 Earth MOID = 1.0569 au 
 Jupiter MOID = 2.81447 au 
 T_jup = 3.544 
[ 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 14.47   n/a MPCxxxxx  
diameter diameter 3.237 km 0.554 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.823 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
[Coley, D. (2015). http://www.planetarysciences.org/PHP/CS3_Lightcurves.php]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.386   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30781 (1988 CR2)          Discovered 1988-Feb-11 by Elst, E. W. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1988 CR2 = 1999 CL39 = 2000 LF17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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