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49870 (1999 XK118)
Classification: Main-belt Asteroid          SPK-ID: 2049870
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136355181391785 3.4643e-08  
a 2.272212291201685 7.0918e-09 au
q 2.014008270168772 7.8498e-08 au
i 2.885151437048501 3.9992e-06 deg
node 298.09721535497 8.1162e-05 deg
peri 285.6405136204434 8.4182e-05 deg
M 193.9118271921816 2.46e-05 deg
tp 2459577.675636502770
(2021-Dec-29.17563650)
8.6452e-05 TDB
period 1251.041694470468
3.43
5.857e-06
1.604e-08
d
yr
n .2877601934381397 1.3472e-09 deg/d
Q 2.530416312234598 7.8977e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      9143 days (25.03 yr)  
   first obs. used      1995-10-19  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52403  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:24  

Additional Information
 Earth MOID = 1.00725 au 
 Jupiter MOID = 2.45644 au 
 T_jup = 3.601 
[ 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 15.0   n/a MPO493212  

49870 (1999 XK118)          Discovered 1999-Dec-05 by CSS at Catalina
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XK118 = 1998 MF28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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