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8487 (1989 SQ)
Classification: Main-belt Asteroid          SPK-ID: 2008487
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2322937378150395 7.3659e-09  
a 2.364373519625603 6.6438e-09 au
q 1.815144357160871 1.6299e-08 au
i 4.2573366315253 8.8491e-07 deg
node 301.6367375619238 4.9629e-06 deg
peri 108.0170878081964 6.7785e-06 deg
M 181.2991848177249 4.7721e-06 deg
tp 2459859.668719275712
(2022-Oct-07.16871928)
1.9235e-05 TDB
period 1327.921972248471
3.64
5.5971e-06
1.532e-08
d
yr
n .2711002660724401 1.1427e-09 deg/d
Q 2.913602682090335 8.1871e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2137  
   data-arc span      15270 days (41.81 yr)  
   first obs. used      1978-09-05  
   last obs. used      2020-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46025  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:38:56  

Additional Information
 Earth MOID = .830261 au 
 Jupiter MOID = 2.488 au 
 T_jup = 3.508 
[ 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 13.92   n/a E2021B10  
diameter diameter 10.598 km 0.601 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.4323 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Owings, L.E. (2013) Minor Planet Bull. 40, 8-10.]
geometric albedo albedo 0.057   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

8487 (1989 SQ)          Discovered 1989-Sep-29 by Mizuno, Y., Furuta, T. at Kani
Reference: 19980313/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 SQ = 1978 RF4 = 1994 AL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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