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27704 (1984 WB4)
Classification: Main-belt Asteroid          SPK-ID: 2027704
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03528885745048129 4.2992e-08  
a 2.666117100344347 1.5866e-08 au
q 2.572032874044005 1.1679e-07 au
i 21.08770380718617 4.6774e-06 deg
node 262.1149399473364 1.3749e-05 deg
peri 188.408573066781 7.51e-05 deg
M 37.52586538527144 7.2991e-05 deg
tp 2458834.753077626177
(2019-Dec-17.25307763)
0.00032239 TDB
period 1590.073711611078
4.35
1.4194e-05
3.886e-08
d
yr
n .2264045983347807 2.021e-09 deg/d
Q 2.760201326644689 1.6426e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1436  
   data-arc span      23783 days (65.11 yr)  
   first obs. used      1954-12-21  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44222  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:08:55  

Additional Information
 Earth MOID = 1.58883 au 
 Jupiter MOID = 2.48526 au 
 T_jup = 3.287 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457146.5 (2015-May-04.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03404456320597868 4.3294e-08  
q 2.574636817533179 1.1739e-07 au
tp 2457249.046395091186
(2015-Aug-14.54639509)
0.00033362 TDB
node 262.1982304671235 1.3753e-05 deg
peri 189.3102302458079 7.7521e-05 deg
i 21.081921114324 4.6782e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1436  
   data-arc span      23783 days (65.11 yr)  
   first obs. used      1954-12-21  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44222  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:08:55  

Additional Information
 Jupiter MOID = 2.48526 au 
 T_jup = 3.287 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.874344837155833E-15 -5.03918667545929E-15 4.709353242095699E-12 2.989897677592706E-15 1.09839891708768E-12 -2.581104622728402E-17
q -5.03918667545929E-15 1.378008417335567E-14 -1.280532143849357E-11 -7.887083345157542E-15 -2.989442098946543E-12 1.590324331962463E-15
tp 4.709353242095699E-12 -1.280532143849357E-11 1.113002112171389E-7 8.101102875498953E-11 2.548213356649101E-8 4.170843401688105E-11
node 2.989897677592706E-15 -7.887083345157542E-15 8.101102875498953E-11 1.891336167376632E-10 -1.574357280083419E-10 1.55309534512717E-11
peri 1.09839891708768E-12 -2.989442098946543E-12 2.548213356649101E-8 -1.574357280083419E-10 6.009528164909001E-9 -5.053223235865898E-12
i -2.581104622728402E-17 1.590324331962463E-15 4.170843401688105E-11 1.55309534512717E-11 -5.053223235865898E-12 2.188549296065827E-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 13.3   n/a MPO493034  

27704 (1984 WB4)          Discovered 1984-Nov-27 by CERGA at Caussols
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1984 WB4 = 1993 XZ1 = 1997 WE55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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