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85969 (1999 GP2)
Classification: Main-belt Asteroid          SPK-ID: 2085969
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .149013356502213 4.3136e-08  
a 3.107921379429488 2.0921e-08 au
q 2.644799582935712 1.3471e-07 au
i 5.812832585465479 4.9081e-06 deg
node 147.6109050235729 3.6467e-05 deg
peri 183.2006411864246 3.8451e-05 deg
M 224.2873849227979 1.2825e-05 deg
tp 2459954.933876160632
(2023-Jan-10.43387616)
7.428e-05 TDB
period 2001.259759553864
5.48
2.0207e-05
5.532e-08
d
yr
n .1798866930099339 1.8164e-09 deg/d
Q 3.571043175923263 2.4039e-08 au
  Orbit Determination Parameters
   # obs. used (total)      759  
   data-arc span      8388 days (22.97 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54187  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:16:06  

Additional Information
 Earth MOID = 1.6321 au 
 Jupiter MOID = 1.79097 au 
 T_jup = 3.195 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457115.5 (2015-Apr-03.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1468460721020647 4.3001e-08  
q 2.654182416086355 1.3386e-07 au
tp 2457951.947227217546
(2017-Jul-17.44722722)
6.923e-05 TDB
node 147.6304236491979 3.646e-05 deg
peri 182.8799729113643 3.8521e-05 deg
i 5.810638041376648 4.9064e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      759  
   data-arc span      8388 days (22.97 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54187  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:16:06  

Additional Information
 Jupiter MOID = 1.79097 au 
 T_jup = 3.195 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.849127181839166E-15 -5.705050904610766E-15 5.718011781868345E-13 2.973341888356859E-15 9.070950139124872E-14 -6.454247495453014E-16
q -5.705050904610766E-15 1.791906197237089E-14 -1.573141630125168E-12 -5.530778661376225E-15 -2.80928809509056E-13 2.610903200825214E-15
tp 5.718011781868345E-13 -1.573141630125168E-12 4.792786515523838E-9 -1.691808929733917E-12 8.674080186975232E-10 -6.184847739042401E-13
node 2.973341888356859E-15 -5.530778661376225E-15 -1.691808929733917E-12 1.329365278100756E-9 -1.322420603016219E-9 3.164538675528312E-11
peri 9.070950139124872E-14 -2.80928809509056E-13 8.674080186975232E-10 -1.322420603016219E-9 1.483885427899463E-9 -3.160608723046625E-11
i -6.454247495453014E-16 2.610903200825214E-15 -6.184847739042401E-13 3.164538675528312E-11 -3.160608723046625E-11 2.40726760630023E-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 14.93   n/a E2021B10  
diameter diameter 5.510 km 0.288 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85969 (1999 GP2)          Discovered 1999-Apr-08 by Bickel, W. at Bergisch Gladbach
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1999 GP2 = 2001 SA66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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