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12271 (1990 RC2)
Classification: Main-belt Asteroid          SPK-ID: 2012271
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05187030861264787 6.1922e-08  
a 2.727493314284718 2.0913e-08 au
q 2.586017394333836 1.6398e-07 au
i 4.310807125504384 6.0164e-06 deg
node 198.8089109939733 6.6559e-05 deg
peri 166.8361659238318 8.2206e-05 deg
M 213.2937310351681 5.0687e-05 deg
tp 2458070.986658242599
(2017-Nov-13.48665824)
0.00023276 JED
period 1645.295723696698
4.50
1.8923e-05
5.181e-08
d
yr
n .2188056498385237 2.5165e-09 deg/d
Q 2.8689692342356 2.1998e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1151  
   data-arc span      9038 days (24.74 yr)  
   first obs. used      1990-09-14  
   last obs. used      2015-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52431  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:35:22  

Additional Information
 Earth MOID = 1.58234 au 
 Jupiter MOID = 2.36653 au 
 T_jup = 3.350 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO337362  
rotation period rot_per 2.54 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Higgins, D.; Pravec, P.; Kusnirak, P.; Galad, A.; et al. (2006) Minor Planet Bul. 33, 89-91.]

12271 (1990 RC2)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 RC2 = 1997 EN41 = 1998 KP64 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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