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85550 (1997 YW)
Classification: Main-belt Asteroid          SPK-ID: 2085550
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1857069613357186 4.8545e-08  
a 2.639979435567211 1.1354e-08 au
q 2.149716876599238 1.2707e-07 au
i 11.39399330928976 3.8002e-06 deg
node 270.2120977982702 2.359e-05 deg
peri 134.4331574094666 2.6054e-05 deg
M 123.4673717647649 1.0764e-05 deg
tp 2458463.160279093552
(2018-Dec-10.66027909)
4.5741e-05 TDB
period 1566.748338134835
4.29
1.0108e-05
2.767e-08
d
yr
n .2297752556920334 1.4824e-09 deg/d
Q 3.130241994535183 1.3463e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1547  
   data-arc span      8208 days (22.47 yr)  
   first obs. used      1997-12-20  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4657  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:36  

Additional Information
 Earth MOID = 1.1768 au 
 Jupiter MOID = 2.29 au 
 T_jup = 3.343 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457178.5 (2015-Jun-05.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1836682433662004 4.829e-08  
q 2.156943382136193 1.2604e-07 au
tp 2456895.682737652141
(2014-Aug-26.18273765)
4.5013e-05 TDB
node 270.3643016466214 2.3583e-05 deg
peri 134.4752658463607 2.6134e-05 deg
i 11.39126658523611 3.798e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1547  
   data-arc span      8208 days (22.47 yr)  
   first obs. used      1997-12-20  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4657  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:36  

Additional Information
 Jupiter MOID = 2.29 au 
 T_jup = 3.343 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.33192996999919E-15 -6.070236733708495E-15 -6.320606864829657E-13 6.610862474065827E-15 -2.417334575929762E-13 -2.43530911466208E-16
q -6.070236733708495E-15 1.58850566110212E-14 1.685076158020276E-12 -1.595302681789257E-14 6.395249373832778E-13 6.206754148578235E-16
tp -6.320606864829657E-13 1.685076158020276E-12 2.026165294834691E-9 1.469158516531581E-12 5.284223105260239E-10 -4.602570912353178E-13
node 6.610862474065827E-15 -1.595302681789257E-14 1.469158516531581E-12 5.561557951092029E-10 -5.445192864398404E-10 -1.308033972478805E-11
peri -2.417334575929762E-13 6.395249373832778E-13 5.284223105260239E-10 -5.445192864398404E-10 6.829640262723856E-10 1.273810683758999E-11
i -2.43530911466208E-16 6.206754148578235E-16 -4.602570912353178E-13 -1.308033972478805E-11 1.273810683758999E-11 1.442500963366962E-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 13.9   n/a MPO337903  

85550 (1997 YW)          Discovered 1997-Dec-20 by Kobayashi, T. at Oizumi
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ 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
2174-Jan-24 02:29 00:04 Hebe 0.0473129807580639 0.047270684906307 0.0473552924486913 8.08252869926946 8.08252868301285 2515120.603239781 4.18471628058798 2512.3678838534 32.7969916980248 -32.9132923631765 117267.549151986 T 27 CATAB v2.0f-lin.ifort 2020-Nov-12 21:00:40 2020-Nov-12 21:00
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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