Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05202257810754229 5.9646e-08  
a 2.727229999836236 2.0133e-08 au
q 2.585352464152523 1.588e-07 au
i 4.311010025112308 5.9226e-06 deg
node 198.810074412367 6.5396e-05 deg
peri 166.8451836263348 8.0975e-05 deg
M 257.0610470464017 5.0396e-05 deg
tp 2458070.890260363606
(2017-Nov-13.39026036)
0.00023117 JED
period 1645.057472143043
4.50
1.8216e-05
4.987e-08
d
yr
n .2188373391788083 2.4233e-09 deg/d
Q 2.869107535519949 2.118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1196  
   data-arc span      9317 days (25.51 yr)  
   first obs. used      1990-09-14  
   last obs. used      2016-03-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .521  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 16:13:01  

Additional Information
 Earth MOID = 1.58244 au 
 Jupiter MOID = 2.36776 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. 2016-February); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Apr-29 17:50 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin