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JPL Small-Body Database Browser
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678 Fredegundis (A909 BQ)
Classification: Main-belt Asteroid          SPK-ID: 2000678
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2194441183683141 3.6575e-08  
a 2.573117107274028 7.9015e-09 au
q 2.008461692209852 9.4368e-08 au
i 6.094396012589807 4.6761e-06 deg
node 281.1163768772551 3.7085e-05 deg
peri 121.2340870139636 3.8602e-05 deg
M 47.0660256482229 1.0041e-05 deg
tp 2458803.397205573396
(2019-Nov-15.89720557)
4.194e-05 TDB
period 1507.605645820161
4.13
6.9443e-06
1.901e-08
d
yr
n .2387892357647376 1.0999e-09 deg/d
Q 3.137772522338203 9.6354e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2299  
   data-arc span      39077 days (106.99 yr)  
   first obs. used      1913-01-07  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46952  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:36:44  

Additional Information
 Earth MOID = 1.02545 au 
 Jupiter MOID = 2.30019 au 
 T_jup = 3.387 
[ 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 9.2   n/a MPO502159 IRAS observations used: 14
diameter diameter 39.585 km 0.581 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.61624 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Zeigler, K.W.; Wampole, R.C. (1988) Minor Planet Bull. 15, 15-16.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Stephens, R.D.; Warner, B.D.; Harris, A.W.; Shepard, M.K. (2008) Bull. Amer. Astron. Soc. 40, #28.16.]
geometric albedo albedo 0.344   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

678 Fredegundis (A909 BQ)          Discovered 1909-Jan-22 by Lorenz, W. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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