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12307 (1991 UA)
Classification: Outer Main-belt Asteroid          SPK-ID: 2012307
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2521499979287465 3.1829e-08  
a 3.980964437626566 2.8369e-08 au
q 2.977164262924614 1.2791e-07 au
i 2.34567554348734 3.9659e-06 deg
node 352.0120599027475 8.9287e-05 deg
peri 27.62326785296429 8.9627e-05 deg
M 221.051992448974 7.9321e-06 deg
tp 2460120.274818072542
(2023-Jun-24.77481807)
7.1223e-05 TDB
period 2901.221410879731
7.94
3.1012e-05
8.491e-08
d
yr
n .1240856691081836 1.3264e-09 deg/d
Q 4.984764612328518 3.5522e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1480  
   data-arc span      10455 days (28.62 yr)  
   first obs. used      1991-09-13  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52582  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:42:29  

Additional Information
 Earth MOID = 1.97994 au 
 Jupiter MOID = .522424 au 
 T_jup = 2.998 
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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 12.9   n/a MPO435817  
rotation period rot_per 3.72 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

12307 (1991 UA)          Discovered 1991-Oct-18 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 UA = 1995 FX15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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