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70145 (1999 NW20)
Classification: Main-belt Asteroid          SPK-ID: 2070145
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07461176629125922 3.3042e-08  
a 2.306280894228672 9.109e-09 au
q 2.134205203146486 7.6012e-08 au
i 6.510720348144734 3.6988e-06 deg
node 90.93804772579057 3.9067e-05 deg
peri 182.3295966916366 4.9467e-05 deg
M 59.15193831802353 2.9942e-05 deg
tp 2458990.299759645976
(2020-May-20.79975965)
0.00010632 TDB
period 1279.283294498425
3.50
7.5791e-06
2.075e-08
d
yr
n .2814075674623321 1.6672e-09 deg/d
Q 2.478356585310858 9.7887e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1086  
   data-arc span      7771 days (21.28 yr)  
   first obs. used      1999-06-15  
   last obs. used      2020-09-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:47:43  

Additional Information
 Earth MOID = 1.11609 au 
 Jupiter MOID = 2.58136 au 
 T_jup = 3.575 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457075.5 (2015-Feb-22.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07463205954244552 3.3141e-08  
q 2.134000705724514 7.6161e-08 au
tp 2457710.283674416600
(2016-Nov-17.78367442)
0.00010583 TDB
node 90.99651418937127 3.9027e-05 deg
peri 182.2060408614819 4.9372e-05 deg
i 6.514033659912037 3.7009e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1086  
   data-arc span      7771 days (21.28 yr)  
   first obs. used      1999-06-15  
   last obs. used      2020-09-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:47:43  

Additional Information
 Jupiter MOID = 2.58136 au 
 T_jup = 3.575 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.098336991460446E-15 -2.508989437220051E-15 1.124561341146802E-13 2.017404309441813E-15 3.616987465999479E-14 -7.965038963822708E-16
q -2.508989437220051E-15 5.800466248574749E-15 -2.609500400155774E-13 -4.732951321956236E-15 -9.269912161230894E-14 1.975454857594171E-15
tp 1.124561341146802E-13 -2.609500400155774E-13 1.120009106961053E-8 1.327741015721063E-11 3.220121953658107E-9 2.508050341819269E-12
node 2.017404309441813E-15 -4.732951321956236E-15 1.327741015721063E-11 1.523109197541722E-9 -1.508760759686851E-9 8.283320672644436E-12
peri 3.616987465999479E-14 -9.269912161230894E-14 3.220121953658107E-9 -1.508760759686851E-9 2.437602406905316E-9 -7.486786808528035E-12
i -7.965038963822708E-16 1.975454857594171E-15 2.508050341819269E-12 8.283320672644436E-12 -7.486786808528035E-12 1.369633920805788E-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 15.41   n/a MPCxxxxx  
diameter diameter 2.531 km 0.649 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.276   0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70145 (1999 NW20)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NW20 = 2002 HJ9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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