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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

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
3.3803e-06 TDB
period 303.1436529109504
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] (  
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)]
[Pravec, P.; Wolf, M.; Sarounova, L. (2000)]
[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)]
geometric albedo albedo 0.056   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (  
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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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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