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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7639969406722095 6.5722e-08  
a 1.874841297770703 1.3055e-09 au
q .4424682820279709 1.2303e-07 au
i 1.322472179712245 9.0243e-06 deg
node 349.4863000044244 0.00042959 deg
peri 43.60816184708844 0.00042991 deg
M 336.1573371243271 9.3989e-06 deg
tp 2459062.600836641194
(2020-Aug-01.10083664)
2.4485e-05 TDB
period 937.6595771792103
2.57
9.7937e-07
2.681e-09
d
yr
n .3839346483112762 4.0102e-10 deg/d
Q 3.307214313513434 2.3029e-09 au
  Orbit Determination Parameters
   # obs. used (total)      143  
   # delay obs. used      0  
   # Doppler obs. used      5  
   data-arc span      30799 days (84.32 yr)  
   first obs. used      1936-02-12  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .74672  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-02 06:44:23  

Additional Information
 Earth MOID = .0115889 au 
 Jupiter MOID = 2.14319 au 
 T_jup = 3.550 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456528.5 (2013-Aug-24.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7639791203944313 6.5141e-08  
q .4423692818624049 1.2187e-07 au
tp 2456250.620801514968
(2012-Nov-19.12080151)
2.5029e-05 TDB
node 349.8767669110032 0.00042611 deg
peri 43.21799859845351 0.00042643 deg
i 1.331588404052601 9.0358e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      143  
   # delay obs. used      0  
   # Doppler obs. used      5  
   data-arc span      30799 days (84.32 yr)  
   first obs. used      1936-02-12  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .74672  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-02 06:44:23  

Additional Information
 Jupiter MOID = 2.14319 au 
 T_jup = 3.550 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.243294799589572E-15 -7.938376890141797E-15 -1.173435006792687E-12 5.436981589239917E-13 -1.164098753495841E-12 -1.655882053924605E-14
q -7.938376890141797E-15 1.485120211436308E-14 2.197204592365118E-12 -1.012429698155568E-12 2.173311017869647E-12 3.15710149386948E-14
tp -1.173435006792687E-12 2.197204592365118E-12 6.264750439577193E-10 -3.261898664159492E-10 6.542457778931462E-10 -3.145772586142706E-12
node 5.436981589239917E-13 -1.012429698155568E-12 -3.261898664159492E-10 1.815662032411186E-7 -1.815848061424412E-7 -1.367184173469748E-9
peri -1.164098753495841E-12 2.173311017869647E-12 6.542457778931462E-10 -1.815848061424412E-7 1.818448441263812E-7 1.376366400923323E-9
i -1.655882053924605E-14 3.15710149386948E-14 -3.145772586142706E-12 -1.367184173469748E-9 1.376366400923323E-9 8.164542072320837E-11

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 18.8   n/a MPO256878  
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

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