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686 Gersuind (A909 QA)
Classification: Main-belt Asteroid          SPK-ID: 2000686
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2683234386490326 1.5854e-08  
a 2.588566807644065 5.5119e-09 au
q 1.89399366064426 4.1412e-08 au
i 15.68749719721646 8.3204e-07 deg
node 243.044653229176 4.8585e-06 deg
peri 89.15965600370771 6.3276e-06 deg
M 300.6648957361518 7.5584e-06 deg
tp 2459647.224459082823
(2022-Mar-08.72445908)
3.2511e-05 TDB
period 1521.204123421595
4.16
4.8587e-06
1.33e-08
d
yr
n .2366546306686729 7.5588e-10 deg/d
Q 3.283139954643869 6.9909e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3161  
   data-arc span      40857 days (111.86 yr)  
   first obs. used      1909-08-16  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38502  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:25:59  

Additional Information
 Earth MOID = .959988 au 
 Jupiter MOID = 2.35343 au 
 T_jup = 3.318 
[ 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 9.70   n/a E2021B10 IRAS observations used: 17
diameter diameter 55.258 km 0.562 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.3127 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Angeli, C.A.; Guimaraes, T.A.; Lazzaro, D.; Duffard, R.; et al. (2001) Astron. J. 121, 2245-2252.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.078   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.839   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=6.03, mean=13.68, max.=20.38) deg.
U-B UB 0.424   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=6.03, mean=13.68, max.=20.38) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

686 Gersuind (A909 QA)          Discovered 1909-Aug-15 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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