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7815 Dolon (1987 QN)
Classification: Jupiter Trojan          SPK-ID: 2007815
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05935377901858938 2.9932e-08  
a 5.270033198179954 8.2612e-08 au
q 4.957236812314551 1.6401e-07 au
i 20.36683486170599 4.8776e-07 deg
node 147.5195858334789 4.6682e-06 deg
peri 218.3317355392779 2.0851e-05 deg
M 230.0044611979211 2.2286e-05 deg
tp 2460796.174853771230
(2025-Apr-30.67485377)
0.00030176 TDB
period 4418.943547226226
12.10
0.00010391
2.845e-07
d
yr
n .08146743585940859 1.9156e-09 deg/d
Q 5.582829584045357 8.7516e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2383  
   data-arc span      12260 days (33.57 yr)  
   first obs. used      1987-08-21  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44566  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:03:39  

Additional Information
 Earth MOID = 3.97115 au 
 Jupiter MOID = .00633256 au 
 T_jup = 2.871 
[ 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 10.32   n/a E2021B10  
diameter diameter 42.516 km 0.955 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.089   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

7815 Dolon (1987 QN)          Discovered 1987-Aug-21 by Elst, E. W. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1987 QN = 1993 BO7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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