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101720 (1999 EP1)
Classification: Main-belt Asteroid          SPK-ID: 2101720
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1528618366301256 5.5708e-08  
a 2.517547915741142 1.0685e-08 au
q 2.132710917536607 1.4084e-07 au
i .8136915953510733 7.46e-06 deg
node 226.3958485237459 0.00052314 deg
peri 197.2874975876189 0.00052433 deg
M 199.1411817645312 3.7117e-05 deg
tp 2459652.439683866658
(2022-Mar-13.93968387)		 0.00015211 TDB
period 1459.032764050524
3.99		 9.2885e-06
2.543e-08		 d
yr
n .2467388045492402 1.5708e-09 deg/d
Q 2.902384913945678 1.2318e-08 au
   Orbit Determination Parameters
   # obs. used (total)      480  
   data-arc span      9803 days (26.84 yr)  
   first obs. used      1993-10-14  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63601  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:58:51  

Additional Information
 Earth MOID = 1.14601 au 
 Jupiter MOID = 2.39808 au 
 T_jup = 3.442 
[ 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 16.8   n/a MPO270554  

101720 (1999 EP1)          Discovered 1999-Mar-06 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ 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
2111-Apr-09 09:23 00:06 Amphi 0.0194115767543048 0.0193946813655235 0.0194284737569184 2.53875157860401 2.53875146195205 2492184.891101982 5.64064616428288 893.824545282237 317.119265689936 21.1234426223842 4474.61091788131 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 19:58:53 2020-Nov-12 19:58

Alternate Designations
 1999 EP1 = 1997 TS27 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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