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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05066248240537368 6.5094e-08  
a 2.730194810544408 2.4341e-08 AU
q 2.591876363991959 1.7686e-07 AU
i 4.305140203218035 7.334e-06 deg
node 198.8655707697582 7.3424e-05 deg
peri 166.6128427489314 9.4643e-05 deg
M 126.0513123991505 6.0468e-05 deg
tp 2456423.555877935963
(2013-May-11.05587794)
0.00027827 JED
period 1647.740749301813
4.51
2.2036e-05
6.033e-08
d
yr
n .2184809716895941 2.9218e-09 deg/d
Q 2.868513257096856 2.5575e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      945  
   data-arc span      8809 days (24.12 yr)  
   first obs. used      1990-09-14  
   last obs. used      2014-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53084  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:16:56  

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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