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8802 Negley (1981 EW31)
Classification: Main-belt Asteroid          SPK-ID: 2008802
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1204205608513378 3.9668e-08  
a 3.106931315381499 1.8477e-08 au
q 2.732792903856674 1.2393e-07 au
i 9.941769025871301 4.0898e-06 deg
node 169.1425713943343 2.4692e-05 deg
peri 209.2314116504192 2.9758e-05 deg
M 210.392568333758 1.8144e-05 deg
tp 2459831.778546009051
(2022-Sep-09.27854601)
0.00010455 TDB
period 2000.303549297442
5.48
1.7844e-05
4.885e-08
d
yr
n .1799726847089989 1.6055e-09 deg/d
Q 3.481069726906323 2.0702e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1389  
   data-arc span      14370 days (39.34 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54279  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:51:56  

Additional Information
 Earth MOID = 1.73862 au 
 Jupiter MOID = 1.99375 au 
 T_jup = 3.186 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO473886  
diameter diameter 7.569 km 0.197 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.764 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.123   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8802 Negley           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring.
Scott Negley, Jr. (b. 1939) is a long-time educator of astronomy. Through his work as a high school planetarium director, he motivated several students to actively pursue a career in astronomy and physics.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-12-25Last Updated: 2016-01-04

Alternate Designations
 1981 EW31 = 1989 SW1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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