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87684 (2000 SY2)
Classification: Aten [NEO, PHA]          SPK-ID: 2087684
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 271 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6426999161558773 8.2776e-08  
a .8586185759286957 1.4861e-09 au
q .3067844891694442 7.1167e-08 au
i 19.22626519266373 3.8343e-06 deg
node 162.0328051745558 1.8673e-05 deg
peri 47.77770443100218 1.7694e-05 deg
M 248.7428183582438 2.299e-05 deg
tp 2459290.309938796364
(2021-Mar-16.80993880)
1.8699e-05 TDB
period 290.6021659868878
0.80
7.5446e-07
2.066e-09
d
yr
n 1.238807008810263 3.2162e-09 deg/d
Q 1.410452662687947 2.4412e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1336  
   data-arc span      15833 days (43.35 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41188  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-18 06:26:02  

Additional Information
 Earth MOID = .0468328 au 
 Jupiter MOID = 3.595 au 
 T_jup = 6.648 
[ 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 16.09   n/a E2021B10  
rotation period rot_per 2.5712 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. (2017) Minor Planet Bull. 44, 22-36.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.]
[Warner, B.D.; Stephens, R.D. (2021) Minor Planet Bull. 48-1, submitted. (NEA) http://www.planetarysciences.org/lightcurves.html]

87684 (2000 SY2)          Discovered 2000-Sep-20 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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