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30947 (1994 JW)
Classification: Main-belt Asteroid          SPK-ID: 2030947
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 .1397105140724317 3.5722e-08  
a 2.686066012673093 1.1625e-08 au
q 2.310794349210048 9.6061e-08 au
i 13.59775792382032 4.9883e-06 deg
node 65.39397578966127 1.8468e-05 deg
peri 30.66533169350943 2.7477e-05 deg
M 70.61115300787918 1.9249e-05 deg
tp 2458685.112663290162
(2019-Jul-20.61266329)
8.5658e-05 TDB
period 1607.953366840963
4.40
1.0438e-05
2.858e-08
d
yr
n .223887089901909 1.4534e-09 deg/d
Q 3.061337676136137 1.3249e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1737  
   data-arc span      9492 days (25.99 yr)  
   first obs. used      1994-05-04  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45203  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 06:54:09  

Additional Information
 Earth MOID = 1.33698 au 
 Jupiter MOID = 2.21053 au 
 T_jup = 3.320 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457012.5 (2014-Dec-21.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391127374685479 3.563e-08  
q 2.312634738433972 9.5681e-08 au
tp 2457079.535377086598
(2015-Feb-26.03537709)
8.53e-05 TDB
node 65.46711278001551 1.8473e-05 deg
peri 31.25603015535749 2.7538e-05 deg
i 13.59517979773315 4.9861e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1737  
   data-arc span      9492 days (25.99 yr)  
   first obs. used      1994-05-04  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45203  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 06:54:09  

Additional Information
 Jupiter MOID = 2.21053 au 
 T_jup = 3.320 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.269528208636027E-15 -3.390619954453741E-15 -8.134554185103273E-13 4.105140949433432E-15 -2.059488061409046E-13 -1.021753358649465E-15
q -3.390619954453741E-15 9.154917405864703E-15 2.175801357780034E-12 -1.152417083334937E-14 5.491871369522574E-13 3.413101844346867E-15
tp -8.134554185103273E-13 2.175801357780034E-12 7.27611360390926E-9 -3.639840461796882E-12 1.761136814286813E-9 -6.361202158834753E-12
node 4.105140949433432E-15 -1.152417083334937E-14 -3.639840461796882E-12 3.412590724288697E-10 -3.322887425669815E-10 -2.773305781943149E-11
peri -2.059488061409046E-13 5.491871369522574E-13 1.761136814286813E-9 -3.322887425669815E-10 7.58324268670905E-10 2.552577185512692E-11
i -1.021753358649465E-15 3.413101844346867E-15 -6.361202158834753E-12 -2.773305781943149E-11 2.552577185512692E-11 2.486120694271292E-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 13.5   n/a MPO385005  
diameter diameter 5.997 km 0.337 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.235   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

30947 (1994 JW)          Discovered 1994-May-04 by Helin, E. F. at Palomar
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ 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
2146-Sep-07 10:29 00:07 Vesta 0.049989766532328 0.0499570405356942 0.050022495997526 5.02199472319648 5.02199424924133 2505119.936660387 7.12048929763736 1755.54838677748 47.1068177810629 21.9635916401382 59344.3072263991 T 24 CATAB v2.0f-lin.ifort 2020-May-20 06:54:23 2020-May-20 06:54

Alternate Designations
 1994 JW = 1998 GT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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