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JPL Small-Body Database Browser
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56238 (1999 JA46)
Classification: Main-belt Asteroid          SPK-ID: 2056238
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1570044537537758 3.817e-08  
a 2.586118588867393 1.4127e-08 au
q 2.180086452479783 1.037e-07 au
i 4.377400913716868 4.8418e-06 deg
node 127.2580244840387 4.8629e-05 deg
peri 98.60895221866971 5.3164e-05 deg
M 26.95787130359294 2.6073e-05 deg
tp 2458886.749274375320
(2020-Feb-07.24927438)
0.00010932 TDB
period 1519.04654353873
4.16
1.2447e-05
3.408e-08
d
yr
n .2369907634043613 1.9419e-09 deg/d
Q 2.992150725255004 1.6345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1118  
   data-arc span      7571 days (20.73 yr)  
   first obs. used      1999-04-14  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56345  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 09:16:42  

Additional Information
 Earth MOID = 1.17593 au 
 Jupiter MOID = 2.00048 au 
 T_jup = 3.400 
[ 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 14.9   n/a MPO337704  
rotation period rot_per 4.25 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

56238 (1999 JA46)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ 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
1976-May-26 08:58 < 00:01 Jupiter 1.98558686077997 1.98558655977932 1.9855871617805 2.10199240671313 1.88817401905072 2442924.873712632 0.921976101158976 74.4736941150364 7.88651057121572 81.4645827686121 3003425.46555558 T 21 CATAB v2.0f-lin.ifort 2020-Jan-29 09:17:10 2020-Jan-29 09:17
2059-Jul-01 20:28 00:01 Jupiter 1.98428109029503 1.98428073498609 1.98428144560398 2.08925387213002 1.87383279810386 2473276.352581881 1.09123867369061 70.4586289496788 10.1250713204055 87.6570536993741 2781098.70016994 T 21 CATAB v2.0f-lin.ifort 2020-Jan-29 09:17:10 2020-Jan-29 09:17
2142-Aug-09 03:52 00:03 Jupiter 1.98915449609698 1.98915397825929 1.98915501393704 2.09819234260423 1.88434878783151 2503629.661419090 3.08049609134941 151.741243026433 9.09099814773059 87.6355600773944 2875895.96139604 T 21 CATAB v2.0f-lin.ifort 2020-Jan-29 09:17:10 2020-Jan-29 09:17

Alternate Designations
 1999 JA46 = 2000 RY68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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