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JPL Small-Body Database Browser
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138971 (2001 CB21)
Classification: Apollo [NEO, PHA]          SPK-ID: 2138971
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 169 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .333477125016685 4.2537e-08  
a 1.034384109663525 4.1382e-09 au
q .6894406706099891 4.1357e-08 au
i 7.899077645046223 3.1566e-06 deg
node 353.7323475091157 8.8827e-06 deg
peri 271.7857720892073 8.5088e-06 deg
M 41.1849432457369 2.845e-05 deg
tp 2458556.540053186297
(2019-Mar-14.04005319)
3.0105e-05 TDB
period 384.256468644551
1.05
2.3059e-06
6.313e-09
d
yr
n .9368742737627432 5.6221e-09 deg/d
Q 1.379327548717061 5.5182e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1135  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      6850 days (18.75 yr)  
   first obs. used      2001-02-02  
   last obs. used      2019-11-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4066  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-06 05:01:58  

Additional Information
 Earth MOID = .0237912 au 
 Jupiter MOID = 3.71664 au 
 T_jup = 5.863 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.4   n/a MPO214609  
rotation period rot_per 3.3020 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Galad, A.; Pravec, P.; Kusnirak, P.; Gajdos, S.; et al. (2005) Earth, Moon, and Planets 97, 147-163.]

138971 (2001 CB21)          Discovered 2001-Feb-02 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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