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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2144770442141912 6.1248e-08  
a 3.980980786929534 3.5458e-08 au
q 3.127151794675403 2.5365e-07 au
i 4.521471116655796 6.4449e-06 deg
node 28.68931892153465 6.4246e-05 deg
peri 4.603546720970285 6.5395e-05 deg
M 11.35292111597899 1.1839e-05 deg
tp 2458909.006831327899
(2020-Feb-29.50683133)
9.5057e-05 TDB
period 2901.239283306351
7.94
3.8761e-05
1.061e-07
d
yr
n .124084904706561 1.6578e-09 deg/d
Q 4.834809779183666 4.3062e-08 au
  Orbit Determination Parameters
   # obs. used (total)      716  
   data-arc span      9103 days (24.92 yr)  
   first obs. used      1995-08-29  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52962  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:56:13  

Additional Information
 Earth MOID = 2.13352 au 
 Jupiter MOID = .626226 au 
 T_jup = 3.010 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457288.5 (2015-Sep-23.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2120434931824859 6.1173e-08  
q 3.139163912943312 2.5311e-07 au
tp 2456008.508381466678
(2012-Mar-22.00838147)
9.5408e-05 TDB
node 28.71071099574169 6.4195e-05 deg
peri 4.614395154428158 6.5394e-05 deg
i 4.522492895016763 6.4456e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      716  
   data-arc span      9103 days (24.92 yr)  
   first obs. used      1995-08-29  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52962  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:56:13  

Additional Information
 Jupiter MOID = .626226 au 
 T_jup = 3.010 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.74213437169089E-15 -1.539575250034752E-14 -2.102790985000427E-12 3.695788242856214E-16 -2.100009505097915E-13 -2.564909325492929E-15
q -1.539575250034752E-14 6.406484393374581E-14 7.844347014247573E-12 -1.488151795876269E-14 8.380886432954206E-13 1.417862182521267E-14
tp -2.102790985000427E-12 7.844347014247573E-12 9.102640793424358E-9 4.075467681569416E-12 1.186069613236822E-9 -6.537358911947869E-13
node 3.695788242856214E-16 -1.488151795876269E-14 4.075467681569416E-12 4.121032681812799E-9 -4.109356837001279E-9 -1.77094176310171E-10
peri -2.100009505097915E-13 8.380886432954206E-13 1.186069613236822E-9 -4.109356837001279E-9 4.276403366126966E-9 1.769820071397992E-10
i -2.564909325492929E-15 1.417862182521267E-14 -6.537358911947869E-13 -1.77094176310171E-10 1.769820071397992E-10 4.154545677696583E-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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