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120557 (1995 DY3)
Classification: Main-belt Asteroid          SPK-ID: 2120557
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1413683589861221 4.4661e-08  
a 2.460655963090844 1.0787e-08 au
q 2.112797067559275 1.1033e-07 au
i 8.03371115742233 4.5908e-06 deg
node 319.1854032001216 2.3975e-05 deg
peri 41.6477032469093 2.8253e-05 deg
M 19.39919155922202 1.2193e-05 deg
tp 2459124.527590028959
(2020-Oct-02.02759003)
4.7875e-05 TDB
period 1409.856050242111
3.86
9.2704e-06
2.538e-08
d
yr
n .2553452176469918 1.679e-09 deg/d
Q 2.808514858622412 1.2311e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1083  
   data-arc span      9511 days (26.04 yr)  
   first obs. used      1995-02-21  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50155  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:06  

Additional Information
 Earth MOID = 1.11439 au 
 Jupiter MOID = 2.64689 au 
 T_jup = 3.463 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457945.5 (2017-Jul-11.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427206969089627 4.4514e-08  
q 2.109531359604191 1.1017e-07 au
tp 2457715.383531675447
(2016-Nov-22.88353168)
5.0387e-05 TDB
node 319.2493561224707 2.4003e-05 deg
peri 41.84474649897344 2.82e-05 deg
i 8.029317061685507 4.589e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1083  
   data-arc span      9511 days (26.04 yr)  
   first obs. used      1995-02-21  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50155  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:06  

Additional Information
 Jupiter MOID = 2.64689 au 
 T_jup = 3.463 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.981538635604212E-15 -4.886795612185049E-15 -5.975869148090689E-13 2.163076256116214E-14 -1.83609444366823E-13 -4.108078874070858E-15
q -4.886795612185049E-15 1.213781341281835E-14 1.27323785019277E-12 -5.246390510364021E-14 3.989733283662219E-13 1.063895355960775E-14
tp -5.975869148090689E-13 1.27323785019277E-12 2.538856347861454E-9 -1.373661565784062E-11 7.548935543339854E-10 5.222245358103406E-13
node 2.163076256116214E-14 -5.246390510364021E-14 -1.373661565784062E-11 5.761412245303714E-10 -5.740314707732009E-10 4.857737962385329E-11
peri -1.83609444366823E-13 3.989733283662219E-13 7.548935543339854E-10 -5.740314707732009E-10 7.952597920640195E-10 -4.79972447893092E-11
i -4.108078874070858E-15 1.063895355960775E-14 5.222245358103406E-13 4.857737962385329E-11 -4.79972447893092E-11 2.105929428604745E-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 15.45   n/a E2021B55  
diameter diameter 2.528 km 0.357 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.303   0.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120557 (1995 DY3)          Discovered 1995-Feb-21 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1995 DY3 = 2001 TP20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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