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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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1397105124476821 4.0627e-08  
a 2.686066013225382 1.265e-08 au
q 2.310794354049361 1.1133e-07 au
i 13.59775779320584 5.7342e-06 deg
node 65.3939754998873 1.8589e-05 deg
peri 30.66533244675531 2.8229e-05 deg
M 70.61115230282383 2.0795e-05 deg
tp 2458685.112666342047
(2019-Jul-20.61266634)
9.2256e-05 TDB
period 1607.953367336886
4.40
1.1359e-05
3.11e-08
d
yr
n .2238870898328581 1.5816e-09 deg/d
Q 3.061337672401402 1.4417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1516  
   data-arc span      9407 days (25.75 yr)  
   first obs. used      1994-05-04  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47541  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:12:08  

Additional Information
 Earth MOID = 1.33698 au 
 Jupiter MOID = 2.21053 au 
 T_jup = 3.320 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456804.5 (2014-May-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390227064467114 4.052e-08  
q 2.312791638908026 1.1082e-07 au
tp 2457079.462196904949
(2015-Feb-25.96219690)
9.0538e-05 TDB
node 65.46749338943886 1.8594e-05 deg
peri 31.23004149448417 2.8311e-05 deg
i 13.59535321939577 5.7319e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1516  
   data-arc span      9407 days (25.75 yr)  
   first obs. used      1994-05-04  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47541  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:12:08  

Additional Information
 Jupiter MOID = 2.21053 au 
 T_jup = 3.320 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.641866603485679E-15 -4.469398486871005E-15 -1.394782044653534E-12 6.189192120301982E-15 -3.217298102378506E-13 -1.119757407897568E-15
q -4.469398486871005E-15 1.228116734476994E-14 3.866431173660425E-12 -1.816209315276202E-14 8.863957686890222E-13 3.995733728727323E-15
tp -1.394782044653534E-12 3.866431173660425E-12 8.197071352834372E-9 -1.179344452409217E-11 1.949659878366366E-9 1.633408063691681E-13
node 6.189192120301982E-15 -1.816209315276202E-14 -1.179344452409217E-11 3.457361164740407E-10 -3.38455361823139E-10 -3.301128316519901E-11
peri -3.217298102378506E-13 8.863957686890222E-13 1.949659878366366E-9 -3.38455361823139E-10 8.015301183857001E-10 3.225306000148328E-11
i -1.119757407897568E-15 3.995733728727323E-15 1.633408063691681E-13 -3.301128316519901E-11 3.225306000148328E-11 3.285477292727306E-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

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