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JPL Small-Body Database Browser
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6689 Floss (1981 EQ24)
Classification: Main-belt Asteroid          SPK-ID: 2006689
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1727315698976237 2.9288e-08  
a 2.212430297700895 7.147e-09 au
q 1.830273739089953 6.5232e-08 au
i 4.419847751573591 4.2445e-06 deg
node 198.8343581593562 4.3203e-05 deg
peri 77.7008906936306 4.551e-05 deg
M 250.6457557189201 1.7244e-05 deg
tp 2459365.620288197776
(2021-May-31.12028820)
5.8548e-05 TDB
period 1201.99544713914
3.29
5.8243e-06
1.595e-08
d
yr
n .2995019663816807 1.4513e-09 deg/d
Q 2.594586856311838 8.3815e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1604  
   data-arc span      14207 days (38.90 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49343  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 20:33:13  

Additional Information
 Earth MOID = .820319 au 
 Jupiter MOID = 2.52522 au 
 T_jup = 3.633 
[ 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 14.9   n/a MPO452262  
diameter diameter 2.994 km 0.365 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 0.88 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.164   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6689 Floss           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Christine Floss (b. 1961) is a meteoriticist at Washington University in St. Louis who studies the trace element and isotopic signatures of interplanetary dust particles, chondrites and differentiated meteorites to understand their origins.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

[ show close-approach data ]
Alternate Designations
 1981 EQ24 = 1991 GX4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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