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305231 (2007 XR18)
Classification: Main-belt Asteroid          SPK-ID: 2305231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1153964860310115 5.7143e-08  
a 2.708078620342717 2.2655e-08 au
q 2.395575863659458 1.4516e-07 au
i 12.20075988984796 3.9679e-06 deg
node 270.134972650719 2.7695e-05 deg
peri 89.0863559361219 4.6666e-05 deg
M 353.0304544952125 3.0241e-05 deg
tp 2459032.013184120242
(2020-Jul-01.51318412)
0.00013659 TDB
period 1627.759841082061
4.46
2.0426e-05
5.592e-08
d
yr
n .2211628465785765 2.7753e-09 deg/d
Q 3.020581377025976 2.5269e-08 au
  Orbit Determination Parameters
   # obs. used (total)      347  
   data-arc span      6596 days (18.06 yr)  
   first obs. used      2002-10-06  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47574  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:12:52  

Additional Information
 Earth MOID = 1.43005 au 
 Jupiter MOID = 2.44949 au 
 T_jup = 3.322 
[ 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 16.0   n/a MPO433966  

305231 (2007 XR18)          Discovered 2007-Dec-13 by OAM at Costitx
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1939-May-19 07:18 00:27 Iris 0.046421501099224 0.0463742606886673 0.0464687436814333 2.84215521513964 2.84215517156778 2429402.803953018 27.304218855681 2405.3054309083 103.134353356025 -11.9875829043654 14251.6531259384 T 9 CATAB v2.0f-lin.ifort 2020-Nov-11 19:12:54 2020-Nov-11 19:12
2146-Jun-21 23:43 00:04 Europ 0.039182966907033 0.0391500922284436 0.0392161108837149 6.52929858879244 6.52929854724848 2505042.488136603 3.49700647998871 5388.21428904968 100.845146913865 72.2477194566462 55343.7598888929 T 9 CATAB v2.0f-lin.ifort 2020-Nov-11 19:12:54 2020-Nov-11 19:12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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