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101728 (1999 EW7)
Classification: Main-belt Asteroid          SPK-ID: 2101728
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392264383130781 5.5198e-08  
a 2.569770275193101 1.6659e-08 au
q 2.211990312495147 1.4925e-07 au
i 8.321566450434375 5.3692e-06 deg
node 346.2377541279156 2.5421e-05 deg
peri 356.8261983074826 2.873e-05 deg
M 239.843598269294 1.4091e-05 deg
tp 2459502.708769756986
(2021-Oct-15.20876976)
6.0097e-05 TDB
period 1504.665207249733
4.12
1.4631e-05
4.006e-08
d
yr
n .2392558811524708 2.3265e-09 deg/d
Q 2.927550237891055 1.8978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      710  
   data-arc span      7773 days (21.28 yr)  
   first obs. used      1999-02-09  
   last obs. used      2020-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52626  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:58:49  

Additional Information
 Earth MOID = 1.20425 au 
 Jupiter MOID = 2.46921 au 
 T_jup = 3.402 
[ 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 15.7   n/a MPO469024  
diameter diameter 2.226 km 0.724 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.187   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101728 (1999 EW7)          Discovered 1999-Mar-12 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
1941-Dec-01 17:14 00:05 Iris 0.0345388328089193 0.0345292623978207 0.0345484121535572 4.48886830436453 4.48886826728549 2430330.217734944 5.11448329926615 1002.22389931551 54.5637538651141 61.7225080437754 83393.0807512414 T 26 CATAB v2.0f-lin.ifort 2020-Nov-12 19:58:51 2020-Nov-12 19:58
2185-Mar-14 06:53 00:07 Iris 0.0233665877735135 0.0233207388577937 0.0234124377425187 4.7277118280642 4.72771177602546 2519187.786627743 7.05421623285307 2298.88720401982 59.1486449151988 6.18980386908548 6544.83108637535 T 26 CATAB v2.0f-lin.ifort 2020-Nov-12 19:58:51 2020-Nov-12 19:58
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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