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249683 (1999 XD155)
Classification: Main-belt Asteroid          SPK-ID: 2249683
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2153544333094776 5.7021e-08  
a 3.156342783050797 3.212e-08 au
q 2.476610371676433 1.8973e-07 au
i 9.510254551559751 5.5938e-06 deg
node 240.4243026549372 3.8233e-05 deg
peri 152.9193267958948 4.082e-05 deg
M 273.0515511272553 1.7584e-05 deg
tp 2459495.190998533566
(2021-Oct-07.69099853)
0.00010575 TDB
period 2048.210885656274
5.61
3.1265e-05
8.56e-08
d
yr
n .1757631514025721 2.6829e-09 deg/d
Q 3.836075194425161 3.9037e-08 au
  Orbit Determination Parameters
   # obs. used (total)      609  
   data-arc span      7158 days (19.60 yr)  
   first obs. used      1999-11-03  
   last obs. used      2019-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 10:26:13  

Additional Information
 Earth MOID = 1.48797 au 
 Jupiter MOID = 1.62665 au 
 T_jup = 3.149 
[ 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 14.6   n/a MPO264607  
diameter diameter 9.740 km 1.676 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.022   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

249683 (1999 XD155)          Discovered 1999-Dec-08 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

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