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85989 (1999 JD6)
Classification: Aten [NEO, PHA]          SPK-ID: 2085989
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 380 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6328433397250064 2.4122e-08  
a .8831477533901051 1.0694e-09 au
q .3242535796640746 2.1318e-08 au
i 17.06134640187528 3.322e-06 deg
node 130.1711888151171 2.0528e-06 deg
peri 309.230128736642 1.192e-06 deg
M 238.1032945970953 3.8007e-06 deg
tp 2459103.145034871240
(2020-Sep-10.64503487)
3.3803e-06 TDB
period 303.1436529109504
0.83
5.5063e-07
1.508e-09
d
yr
n 1.187555789286973 2.1571e-09 deg/d
Q 1.442041927116136 1.7462e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2933  
   # delay obs. used      11  
   # Doppler obs. used      4  
   data-arc span      10979 days (30.06 yr)  
   first obs. used      1990-06-22  
   last obs. used      2020-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .2891  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-02 06:46:45  

Additional Information
 Earth MOID = .0477289 au 
 Jupiter MOID = 3.86188 au 
 T_jup = 6.502 
[ show covariance matrix ]

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 17.1   n/a MPO263970  
diameter diameter 1.462 km 0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 7.6638 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1999) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pravec, P.; Wolf, M.; Sarounova, L. (2000) http://www.asu.cas.cz/~ppravec/neo.htm]
[Szabo, Gy.M.; Csak, B.; Sarneczky, K.; Kiss, L.L. (2001) Astron. Astrophys. 375, 285-292.]
[Polishook, D.; Brosch, N.; Prianik, D. (2005) Abstr. IAU Symp. 229, p. 60-61.]
[Polishook, D.; Brosch, N. (2008) Icarus 194, 111-124.]
[Warner, Brian D. (2014) Minor Planet Bull. 41, 213-224.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 256-266.]
[Vaduvescu, O.; Aznar Macias, A.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]
[Aznar Macias, A.; Predatu, M.; Vaduvescu, O.; Oey, J. (2018) arXiv:1801.09420. Romanian J. Phys. 62, 904 (2017).]
[Warner, B.D. (2018) Minor Planet Bull. 45, 366-379.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46-4, submitted. (NEA Gaggle) http://www.planetarysciences.org/lightcurves.html]
geometric albedo albedo 0.056   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)  
SMASSII spectral type spec_B K   n/a Binzel et al. (2001) Icarus 151, 139-149  

85989 (1999 JD6)          Discovered 1999-May-12 by LONEOS at Anderson Mesa
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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