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JPL Small-Body Database Browser
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39465 (1978 RW6)
Classification: Main-belt Asteroid          SPK-ID: 2039465
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06927877404365913 4.4906e-08  
a 2.328193248978009 9.1305e-09 au
q 2.166898874952089 1.0693e-07 au
i 7.602118487565467 4.7822e-06 deg
node 332.4134319031876 2.4433e-05 deg
peri 9.781606215018043 3.4593e-05 deg
M 266.0822688740637 2.53e-05 deg
tp 2459339.010431795965
(2021-May-04.51043180)
9.1671e-05 TDB
period 1297.558554551724
3.55
7.633e-06
2.09e-08
d
yr
n .2774441266925111 1.6321e-09 deg/d
Q 2.48948762300393 9.7631e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1438  
   data-arc span      15212 days (41.65 yr)  
   first obs. used      1978-09-02  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:25  

Additional Information
 Earth MOID = 1.15845 au 
 Jupiter MOID = 2.78502 au 
 T_jup = 3.558 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456957.5 (2014-Oct-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06876996416619244 4.4966e-08  
q 2.167871091829259 1.0696e-07 au
tp 2456740.998857277548
(2014-Mar-24.49885728)
8.9622e-05 TDB
node 332.4472740951976 2.4419e-05 deg
peri 9.039124638458368 3.469e-05 deg
i 7.605202571668504 4.783e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1438  
   data-arc span      15212 days (41.65 yr)  
   first obs. used      1978-09-02  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:25  

Additional Information
 Jupiter MOID = 2.78502 au 
 T_jup = 3.558 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.021906340089906E-15 -4.794818873545095E-15 -3.603888911314561E-13 7.42894964215178E-15 -1.491143087181732E-13 8.846896163816833E-16
q -4.794818873545095E-15 1.14396873239785E-14 9.075788722081639E-13 -1.779128760612704E-14 3.703466767481776E-13 -1.970764550107986E-15
tp -3.603888911314561E-13 9.075788722081639E-13 8.032190402011412E-9 -1.141489948388528E-11 2.212712018293484E-9 -7.075986103799309E-12
node 7.42894964215178E-15 -1.779128760612704E-14 -1.141489948388528E-11 5.963018813676322E-10 -5.939329255636461E-10 -4.254999309877958E-13
peri -1.491143087181732E-13 3.703466767481776E-13 2.212712018293484E-9 -5.939329255636461E-10 1.203427314235661E-9 -1.510673712350884E-12
i 8.846896163816833E-16 -1.970764550107986E-15 -7.075986103799309E-12 -4.254999309877958E-13 -1.510673712350884E-12 2.287716842443303E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO358989  
diameter diameter 2.421 km 0.296 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.477   0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39465 (1978 RW6)          Discovered 1978-Sep-02 by Lagerkvist, C.-I. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1978 RW6 = 1998 EH18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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