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364888 (2008 EN57)
Classification: Main-belt Asteroid          SPK-ID: 2364888
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1996466544600781 6.4841e-08  
a 2.576345929678213 2.2962e-08 au
q 2.061987084086118 1.7054e-07 au
i 14.75303480999277 5.4533e-06 deg
node 159.9426574420549 2.0231e-05 deg
peri 222.3735191954613 2.2675e-05 deg
M 139.2708656347255 9.8387e-06 deg
tp 2458416.164239958110
(2018-Oct-24.66423996)
3.9116e-05 TDB
period 1510.444217147377
4.14
2.0193e-05
5.529e-08
d
yr
n .2383404801799934 3.1863e-09 deg/d
Q 3.090704775270309 2.7546e-08 au
  Orbit Determination Parameters
   # obs. used (total)      542  
   data-arc span      4443 days (12.16 yr)  
   first obs. used      2008-02-18  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49228  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:39:56  

Additional Information
 Earth MOID = 1.08535 au 
 Jupiter MOID = 2.42759 au 
 T_jup = 3.353 
[ 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 15.76   n/a E2021B25  
rotation period rot_per 3.91917 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

364888 (2008 EN57)          Discovered 2008-Feb-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2013-06-26

[ 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
1913-Jan-06 03:46 00:50 Europ 0.0486395307967964 0.0486085001484022 0.0486707151452325 3.34650826004684 3.34650819475026 2419773.657136999 50.4335645371618 4580.25356421487 55.1403712796705 70.2376122389984 124070.790404994 T 24 CATAB v2.0f-lin.ifort 2020-Nov-12 19:39:57 2020-Nov-12 19:39
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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