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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05066249427179313 6.3978e-08  
a 2.730194804540598 2.3561e-08 AU
q 2.59187632589468 1.726e-07 AU
i 4.305140249085132 7.0047e-06 deg
node 198.8655715409799 7.2748e-05 deg
peri 166.6128592759118 9.2581e-05 deg
M 126.0512972712107 5.8449e-05 deg
tp 2456423.555949080501
(2013-May-11.05594908)
0.00026856 JED
period 1647.740743866639
4.51
2.133e-05
5.84e-08
d
yr
n .218480972410267 2.8282e-09 deg/d
Q 2.868513283186515 2.4755e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      955  
   data-arc span      8849 days (24.23 yr)  
   first obs. used      1990-09-14  
   last obs. used      2014-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53159  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:15:22  

Additional Information
 Earth MOID = 1.59013 AU 
 T_jup = 3.349 
[ 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 13.7 mag n/a MPO272698  
rotation period rot_per 2.54 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 (675)
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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