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69999 (1998 XN)
Classification: Outer Main-belt Asteroid          SPK-ID: 2069999
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1147116990961056 5.68e-08  
a 3.360356156983671 3.3442e-08 au
q 2.974883992648014 1.8644e-07 au
i 9.236153281912344 6.3416e-06 deg
node 294.6472701901361 3.7972e-05 deg
peri 282.4874750454065 4.9545e-05 deg
M 30.17411739596593 3.2174e-05 deg
tp 2458811.914426664627
(2019-Nov-24.41442666)
0.00020145 TDB
period 2249.968259545866
6.16
3.3588e-05
9.196e-08
d
yr
n .1600022571308017 2.3885e-09 deg/d
Q 3.745828321319328 3.7279e-08 au
  Orbit Determination Parameters
   # obs. used (total)      657  
   data-arc span      7895 days (21.62 yr)  
   first obs. used      1998-12-09  
   last obs. used      2020-07-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58912  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:02:36  

Additional Information
 Earth MOID = 1.98573 au 
 Jupiter MOID = 1.44791 au 
 T_jup = 3.124 
[ 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 14.03   n/a E2021B10  
rotation period rot_per 168.589 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

69999 (1998 XN)          Discovered 1998-Dec-09 by Klet at Klet
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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