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2101 Adonis (1936 CA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2002101
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7639569345603932 7.2613e-08  
a 1.874240001858531 9.0149e-09 au
q .4424013554082221 1.3627e-07 au
i 1.322075886938271 9.8922e-06 deg
node 349.4986808146188 0.00048176 deg
peri 43.60366468106144 0.00048203 deg
M 52.96872412577243 1.0414e-05 deg
tp 2459062.603500313848
(2020-Aug-01.10350031)
2.6958e-05 TDB
period 937.2085264719548
2.57
6.7618e-06
1.851e-08
d
yr
n .3841194246868311 2.7714e-09 deg/d
Q 3.306078648308839 1.5902e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -3.261453695028981E-14 5.715E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      115  
   # delay obs. used      0  
   # Doppler obs. used      5  
   data-arc span      30790 days (84.30 yr)  
   first obs. used      1936-02-21  
   last obs. used      2020-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39237  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:20:31  

Additional Information
 Earth MOID = .0115597 au 
 Jupiter MOID = 2.14546 au 
 T_jup = 3.551 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ show covariance matrix ]

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 18.64   n/a E2021B10  
diameter diameter 0.6 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)

2101 Adonis (1936 CA)          Discovered 1936-Feb-12 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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