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163899 (2003 SD220)
Classification: Aten [NEO, PHA]          SPK-ID: 2163899
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 125 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2106576857092111 5.5332e-09  
a .8266883038496593 1.6395e-09 au
q .6525400589578169 4.6186e-09 au
i 8.514735065603798 3.6246e-07 deg
node 273.91468001 2.4087e-06 deg
peri 326.9350666016791 4.1361e-06 deg
M 94.75990925968662 4.2387e-06 deg
tp 2459128.234127238304
(2020-Oct-05.73412724)
3.1198e-06 TDB
period 274.5434688304249
0.75
8.167e-07
2.236e-09
d
yr
n 1.311267762200376 3.9007e-09 deg/d
Q 1.000836548741502 1.9848e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1178  
   # delay obs. used      9  
   # Doppler obs. used      4  
   data-arc span      7774 days (21.28 yr)  
   first obs. used      2000-01-06  
   last obs. used      2021-04-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .22815  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-21 06:23:16  

Additional Information
 Earth MOID = .0183556 au 
 Jupiter MOID = 4.00384 au 
 T_jup = 7.065 
[ show covariance matrix ]

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 17.9   n/a MPO493931  
diameter diameter 0.791 km 0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 285. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2016) Minor Planet Bull. 43, 143-154.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
geometric albedo albedo 0.340   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

163899 (2003 SD220)          Discovered 2003-Sep-29 by LONEOS at Anderson Mesa
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

[ show close-approach data ]
Alternate Designations
 2003 SD220 = 2000 AD229 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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