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488453 (1994 XD)
Classification: Apollo [NEO, PHA]          SPK-ID: 2488453
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7339559873832214 5.5602e-09  
a 2.346987395860463 1.6514e-09 au
q .6244019443557213 1.3363e-08 au
i 4.309956862603774 1.1248e-05 deg
node 96.14470340707474 6.9492e-05 deg
peri 249.3873721044209 6.8435e-05 deg
M 152.4805205655697 1.1039e-06 deg
tp 2458840.241797585381
(2019-Dec-22.74179759)
3.4781e-06 TDB
period 1313.30187047171
3.60
1.3861e-06
3.795e-09
d
yr
n .2741182420388206 2.8932e-10 deg/d
Q 4.069572847365205 2.8635e-09 au
  Orbit Determination Parameters
   # obs. used (total)      305  
   # delay obs. used      6  
   # Doppler obs. used      2  
   data-arc span      8075 days (22.11 yr)  
   first obs. used      1994-12-01  
   last obs. used      2017-01-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37435  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 17:25:00  

Additional Information
 Earth MOID = .0201091 au 
 Jupiter MOID = 1.38206 au 
 T_jup = 3.127 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454655.5 (2008-Jul-08.0) TDB
Reference: JPL 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7333584101783943 5.7648e-09  
q .6262696091205585 1.3634e-08 au
tp 2454898.994350562784
(2009-Mar-08.49435056)
1.5289e-06 TDB
node 96.37611523474048 6.9206e-05 deg
peri 249.2144493110854 6.8148e-05 deg
i 4.308014853296322 1.1251e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      305  
   # delay obs. used      6  
   # Doppler obs. used      2  
   data-arc span      8075 days (22.11 yr)  
   first obs. used      1994-12-01  
   last obs. used      2017-01-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37435  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 17:25:00  

Additional Information
 Jupiter MOID = 1.38206 au 
 T_jup = 3.127 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.323282136256681E-17 -7.856009646833028E-17 6.54019751380843E-15 1.542050213803425E-13 -1.459385380446789E-13 -4.236650130973023E-14
q -7.856009646833028E-17 1.858990607570722E-16 -1.581655829651264E-14 -3.557153139644994E-13 3.367595696299716E-13 9.842486504131612E-14
tp 6.54019751380843E-15 -1.581655829651264E-14 2.337645846180361E-12 4.294718074443824E-11 -4.243142224195962E-11 -8.002068833419333E-12
node 1.542050213803425E-13 -3.557153139644994E-13 4.294718074443824E-11 4.789415095708553E-9 -4.714765766661135E-9 -7.215481716952578E-10
peri -1.459385380446789E-13 3.367595696299716E-13 -4.243142224195962E-11 -4.714765766661135E-9 4.644081950943944E-9 7.041778593383683E-10
i -4.236650130973023E-14 9.842486504131612E-14 -8.002068833419333E-12 -7.215481716952578E-10 7.041778593383683E-10 1.265839915269017E-10

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 19.1   n/a MPO264917  
rotation period rot_per 2.7365 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2013) Minor Planet Bull. 40, 94-98.]

488453 (1994 XD)          Discovered 1994-Dec-01 by Spacewatch at Kitt Peak
Reference: Last Updated: 2017-05-15

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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