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312832 (2011 SN257)
Classification: Main-belt Asteroid          SPK-ID: 2312832
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1201006011607366 9.401e-08  
a 2.348426010369542 2.3512e-08 au
q 2.06637863474265 2.301e-07 au
i 5.854019228545892 6.3888e-06 deg
node 233.1487928972672 9.7452e-05 deg
peri 144.7051848301813 0.00010288 deg
M 147.5611516213096 3.3386e-05 deg
tp 2458461.692931126883
(2018-Dec-09.19293113)
0.00012059 TDB
period 1314.509562056782
3.60
1.9741e-05
5.405e-08
d
yr
n .2738663988390593 4.1129e-09 deg/d
Q 2.630473385996434 2.6336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      106  
   data-arc span      6539 days (17.90 yr)  
   first obs. used      2002-03-05  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56716  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:48:26  

Additional Information
 Earth MOID = 1.07194 au 
 Jupiter MOID = 2.82834 au 
 T_jup = 3.543 
[ show covariance matrix ]

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 17.5   n/a MPO455306  

312832 (2011 SN257)          Discovered 2009-Jan-01 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1914-Feb-18 04:49 00:02 Iris 0.0374503367976176 0.0374183583615478 0.0374823582128946 3.02654132670736 3.02654127598836 2420181.700775917 1.743036519164 2559.80905485159 92.6339320904868 -51.5129776040595 47314.6533692459 T 7 CATAB v2.0f-lin.ifort 2020-Feb-25 18:48:27 2020-Feb-25 18:48
2081-Jul-25 16:22 00:01 Iris 0.0123931918914197 0.0123813839910762 0.0124050644211767 2.80049208434639 2.80049191871008 2481336.181959636 1.45610461111052 1545.63752809733 95.5741354192741 -67.8320441213864 17949.5633212969 T 7 CATAB v2.0f-lin.ifort 2020-Feb-25 18:48:27 2020-Feb-25 18:48
2104-Aug-31 21:44 00:02 Hebe 0.0135018394770927 0.0134671064968942 0.0135366266575945 5.85301781961511 5.85301774094953 2489773.405764309 1.68509570763363 2196.33104828648 64.7744106105804 -37.930305880321 19174.8058554816 T 7 CATAB v2.0f-lin.ifort 2020-Feb-25 18:48:27 2020-Feb-25 18:48
2185-May-20 07:23 00:06 Hebe 0.0237588038510428 0.0237316189994898 0.0237862496031382 5.69986307310441 5.69986302719851 2519254.807515012 5.64731616640138 4157.48745114035 56.0291472784276 -70.8958717762696 59922.7875452392 T 7 CATAB v2.0f-lin.ifort 2020-Feb-25 18:48:27 2020-Feb-25 18:48

Alternate Designations
 2011 SN257 = 2010 JP168 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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