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JPL Small-Body Database Browser
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172257 (2002 SD16)
Classification: Main-belt Asteroid          SPK-ID: 2172257
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2359927564007287 4.4016e-08  
a 2.705527772285238 2.0961e-08 au
q 2.067042815784922 1.2066e-07 au
i 11.93727682701095 9.1197e-06 deg
node 298.6131033030164 2.8296e-05 deg
peri 104.1531486377804 3.7194e-05 deg
M 330.5556325051971 2.5487e-05 deg
tp 2459133.446267869034
(2020-Oct-10.94626787)
0.00011599 TDB
period 1625.460504162637
4.45
1.889e-05
5.172e-08
d
yr
n .2214756981655827 2.5738e-09 deg/d
Q 3.344012728785554 2.5908e-08 au
  Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      6642 days (18.18 yr)  
   first obs. used      1998-12-17  
   last obs. used      2017-02-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58862  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 07:19:23  

Additional Information
 Earth MOID = 1.11411 au 
 Jupiter MOID = 2.20884 au 
 T_jup = 3.294 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456621.5 (2013-Nov-25.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2387141087994201 4.4712e-08  
q 2.058976356783205 1.2329e-07 au
tp 2455877.403046368877
(2011-Nov-11.90304637)
9.2909e-05 TDB
node 298.9544333091641 2.8391e-05 deg
peri 103.0646809381779 3.6799e-05 deg
i 11.90977668440333 9.1122e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      6642 days (18.18 yr)  
   first obs. used      1998-12-17  
   last obs. used      2017-02-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58862  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 07:19:23  

Additional Information
 Jupiter MOID = 2.20884 au 
 T_jup = 3.294 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.999157548444439E-15 -5.464323974003537E-15 -6.394867954802538E-13 -3.821103113996664E-16 -1.825394519178048E-13 -3.105151179413892E-15
q -5.464323974003537E-15 1.520090283775874E-14 2.333341284016775E-12 -1.29148828434492E-15 6.673108354793595E-13 1.193226790471008E-14
tp -6.394867954802538E-13 2.333341284016775E-12 8.631989378068079E-9 -4.384634217916462E-11 2.200341276070835E-9 1.641766739556126E-11
node -3.821103113996664E-16 -1.29148828434492E-15 -4.384634217916462E-11 8.060514929088568E-10 -7.980386625529219E-10 8.645711471372524E-11
peri -1.825394519178048E-13 6.673108354793595E-13 2.200341276070835E-9 -7.980386625529219E-10 1.354202809385539E-9 -8.031590287500623E-11
i -3.105151179413892E-15 1.193226790471008E-14 1.641766739556126E-11 8.645711471372524E-11 -8.031590287500623E-11 8.303128361077254E-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 15.9   n/a MPO417926  

172257 (2002 SD16)          Discovered 2002-Sep-27 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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