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85577 (1998 DC2)
Classification: Outer Main-belt Asteroid          SPK-ID: 2085577
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2144770367551514 5.8513e-08  
a 3.980980789461426 3.4925e-08 au
q 3.127151826358556 2.4173e-07 au
i 4.521471704146112 6.3359e-06 deg
node 28.6893138939922 6.3427e-05 deg
peri 4.603552257123542 6.4582e-05 deg
M 11.35292012643799 1.1595e-05 deg
tp 2458909.006839215324
(2020-Feb-29.50683922)
9.3124e-05 TDB
period 2901.23928607412
7.94
3.8179e-05
1.045e-07
d
yr
n .1240849045881846 1.6329e-09 deg/d
Q 4.834809752564295 4.2416e-08 au
  Orbit Determination Parameters
   # obs. used (total)      747  
   data-arc span      9189 days (25.16 yr)  
   first obs. used      1995-08-29  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52314  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:30  

Additional Information
 Earth MOID = 2.13352 au 
 Jupiter MOID = .626226 au 
 T_jup = 3.010 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457315.5 (2015-Oct-20.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2120979150146636 5.8428e-08  
q 3.13877391723491 2.4107e-07 au
tp 2456008.489865316038
(2012-Mar-21.98986532)
9.4512e-05 TDB
node 28.71046179309378 6.3375e-05 deg
peri 4.602810361489863 6.4579e-05 deg
i 4.522621378885272 6.3367e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      747  
   data-arc span      9189 days (25.16 yr)  
   first obs. used      1995-08-29  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52314  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:30  

Additional Information
 Jupiter MOID = .626226 au 
 T_jup = 3.010 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.413830294953616E-15 -1.399801836343299E-14 -1.874579419550605E-12 -7.268859020986464E-16 -1.856730378352236E-13 -2.147877323176224E-15
q -1.399801836343299E-14 5.811474822748575E-14 6.878785317599686E-12 -8.998938429422063E-15 7.343711547799397E-13 1.229890831758771E-14
tp -1.874579419550605E-12 6.878785317599686E-12 8.93259459437372E-9 3.908676024200498E-12 1.169010088855438E-9 -8.676364471321921E-13
node -7.268859020986464E-16 -8.998938429422063E-15 3.908676024200498E-12 4.016338896179805E-9 -4.004851514337145E-9 -1.650204235522883E-10
peri -1.856730378352236E-13 7.343711547799397E-13 1.169010088855438E-9 -4.004851514337145E-9 4.170407861819528E-9 1.649083928601799E-10
i -2.147877323176224E-15 1.229890831758771E-14 -8.676364471321921E-13 -1.650204235522883E-10 1.649083928601799E-10 4.015370012542816E-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 13.6   n/a MPO502666  
diameter diameter 10.811 km 0.721 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.042   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

85577 (1998 DC2)          Discovered 1998-Feb-21 by Galad, A., Pravda, A. at Modra
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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