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97185 (1999 WR4)
Classification: Main-belt Asteroid          SPK-ID: 2097185
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 .04800152337558287 4.8125e-08  
a 2.972574540058212 1.9168e-08 au
q 2.829886433787945 1.4614e-07 au
i 11.29441188228894 5.2481e-06 deg
node 57.95904529084175 1.934e-05 deg
peri 329.2509748271207 4.6194e-05 deg
M 41.87765960854549 4.0194e-05 deg
tp 2458782.740325204744
(2019-Oct-26.24032520)
0.00020953 TDB
period 1871.964280217207
5.13
1.8107e-05
4.957e-08
d
yr
n .1923113618162782 1.8602e-09 deg/d
Q 3.115262646328478 2.0089e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1176  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1999-11-03  
   last obs. used      2020-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5106  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 04:25:17  

Additional Information
 Earth MOID = 1.84229 au 
 Jupiter MOID = 2.15093 au 
 T_jup = 3.231 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457416.5 (2016-Jan-29.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04657485893941309 4.7727e-08  
q 2.83444682246057 1.44e-07 au
tp 2456891.547559680849
(2014-Aug-22.04755968)
0.00022462 TDB
node 58.07369753573432 1.9397e-05 deg
peri 325.6654463935283 4.7882e-05 deg
i 11.27808952436959 5.2402e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1176  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1999-11-03  
   last obs. used      2020-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5106  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 04:25:17  

Additional Information
 Jupiter MOID = 2.15093 au 
 T_jup = 3.231 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.277843991644553E-15 -6.818005318413586E-15 1.273236117879248E-12 -9.993683405675775E-16 2.107801286033663E-13 -3.940182219110787E-16
q -6.818005318413586E-15 2.073467328663132E-14 -5.027090528529219E-12 3.458154480556348E-15 -8.551668309704115E-13 2.167783608801082E-15
tp 1.273236117879248E-12 -5.027090528529219E-12 5.045471870314246E-8 -1.023990693347205E-12 9.84451675795743E-9 -5.811626419050576E-12
node -9.993683405675775E-16 3.458154480556348E-15 -1.023990693347205E-12 3.762390314058406E-10 -3.689178562258156E-10 -2.381931224235503E-11
peri 2.107801286033663E-13 -8.551668309704115E-13 9.84451675795743E-9 -3.689178562258156E-10 2.292667872784107E-9 2.214725628986181E-11
i -3.940182219110787E-16 2.167783608801082E-15 -5.811626419050576E-12 -2.381931224235503E-11 2.214725628986181E-11 2.745926322351031E-11

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 14.3   n/a MPO333598  
diameter diameter 4.838 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.190   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

97185 (1999 WR4)          Discovered 1999-Nov-28 by Kobayashi, T. at Oizumi
Reference: 20050224/Numbers.arcLast Updated: 2005-02-28

[ 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
2107-Jun-19 19:14 00:05 Thisb 0.0396969727731551 0.0396779601455022 0.0397159961553609 5.26118331195587 5.26118327930957 2490795.301493125 4.67576497410014 1401.05250450765 52.7357129743543 -47.4611596263713 82994.3178591715 T 24 CATAB v2.0f-lin.ifort 2020-Dec-18 04:25:20 2020-Dec-18 04:25

Alternate Designations
 1999 WR4 = 2001 EE2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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