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442621 (2012 SD)
Classification: Main-belt Asteroid          SPK-ID: 2442621
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1099410926118947 1.1939e-07  
a 2.173614048256211 3.7085e-08 au
q 1.934644544874359 2.6896e-07 au
i 4.640782571103951 9.75e-06 deg
node 11.55221968368553 0.0001137 deg
peri 309.9778565573911 0.00012098 deg
M 175.5717536787867 3.3798e-05 deg
tp 2458429.647086920146
(2018-Nov-07.14708692)
0.00011006 TDB
period 1170.501771513475
3.20
2.9956e-05
8.202e-08
d
yr
n .3075604059398517 7.8712e-09 deg/d
Q 2.412583551638062 4.1162e-08 au
  Orbit Determination Parameters
   # obs. used (total)      65  
   data-arc span      3217 days (8.81 yr)  
   first obs. used      2008-04-09  
   last obs. used      2017-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52818  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:26:54  

Additional Information
 Earth MOID = .926237 au 
 Jupiter MOID = 2.84201 au 
 T_jup = 3.674 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456849.5 (2014-Jul-11.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104048968503518 1.195e-07  
q 1.933190139339608 2.6922e-07 au
tp 2457259.378897153800
(2015-Aug-24.87889715)
0.00011534 TDB
node 11.58450500101928 0.00011362 deg
peri 310.0220740908329 0.00012082 deg
i 4.643649464334501 9.7553e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      65  
   data-arc span      3217 days (8.81 yr)  
   first obs. used      2008-04-09  
   last obs. used      2017-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52818  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:26:54  

Additional Information
 Jupiter MOID = 2.84201 au 
 T_jup = 3.674 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.428003047984891E-14 -3.194275624338056E-14 3.21597094062719E-12 1.442036083972422E-13 1.019735708288511E-12 -6.315437375764047E-14
q -3.194275624338056E-14 7.247759420038482E-14 -8.243484002783731E-12 -3.213747193498686E-13 -2.77090878816777E-12 1.420152740094116E-13
tp 3.21597094062719E-12 -8.243484002783731E-12 1.330293050333044E-8 3.827533844231054E-11 4.79607525153596E-9 -1.435321707885856E-11
node 1.442036083972422E-13 -3.213747193498686E-13 3.827533844231054E-11 1.290880213213639E-8 -1.28536012072207E-8 -6.575453136500539E-10
peri 1.019735708288511E-12 -2.77090878816777E-12 4.79607525153596E-9 -1.28536012072207E-8 1.459855420709608E-8 6.505837229722285E-10
i -6.315437375764047E-14 1.420152740094116E-13 -1.435321707885856E-11 -6.575453136500539E-10 6.505837229722285E-10 9.516636814366719E-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 18.7   n/a MPO353534  

442621 (2012 SD)          Discovered 2008-Apr-09 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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