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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7640448654510354 5.9519e-08  
a 1.874101943759337 9.0466e-09 au
q .4422039762982103 1.1173e-07 au
i 1.32206191472938 9.888e-06 deg
node 349.4982242961222 0.00045009 deg
peri 43.59766354540302 0.00045033 deg
M 128.2631346820421 8.767e-06 deg
tp 2459062.622162159396
(2020-Aug-01.12216216)
2.2335e-05 TDB
period 937.1049750232404
2.57
6.7854e-06
1.858e-08
d
yr
n .3841618704362037 2.7816e-09 deg/d
Q 3.305999911220463 1.5959e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -3.266035344665914E-14 5.68E-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)      119  
   # 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      .39092  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Sep-11 06:30:37  

Additional Information
 Earth MOID = .0115838 au 
 Jupiter MOID = 2.14658 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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