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180318 (2003 XE12)
Classification: Main-belt Asteroid          SPK-ID: 2180318
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2166914142024199 5.1986e-08  
a 2.253923400599107 1.1059e-08 au
q 1.765517551419359 1.1523e-07 au
i 3.34207710556333 5.2732e-06 deg
node 159.7160630994344 0.00010038 deg
peri 213.1888876355721 0.00010126 deg
M 52.70627759183381 1.7329e-05 deg
tp 2459019.546494903064
(2020-Jun-19.04649490)
5.8532e-05 TDB
period 1235.967797600454
3.38
9.0968e-06
2.491e-08
d
yr
n .291269724582562 2.1438e-09 deg/d
Q 2.742329249778854 1.3456e-08 au
  Orbit Determination Parameters
   # obs. used (total)      325  
   data-arc span      8888 days (24.33 yr)  
   first obs. used      1996-09-18  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54734  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:26:01  

Additional Information
 Earth MOID = .765414 au 
 Jupiter MOID = 2.72205 au 
 T_jup = 3.591 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.1   n/a MPO475521  
rotation period rot_per 53.668 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

180318 (2003 XE12)          Discovered 2003-Dec-14 by NEAT at Palomar
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

Alternate Designations
 2003 XE12 = 2006 QB15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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