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JPL Small-Body Database Browser
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37 Fides
Classification: Main-belt Asteroid          SPK-ID: 2000037
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 122 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1756051692749518 3.1696e-08  
a 2.64228330584972 4.1234e-09 au
q 2.1782846986536 8.445e-08 au
i 3.070810676589737 3.83e-06 deg
node 7.269139807248922 6.9326e-05 deg
peri 62.84344539366143 7.028e-05 deg
M 341.5425477043891 1.1843e-05 deg
tp 2458680.933460171001
(2019-Jul-16.43346017)
5.1658e-05 TDB
period 1568.799702028538
4.30
3.6723e-06
1.005e-08
d
yr
n .2294748013621507 5.3716e-10 deg/d
Q 3.106281913045839 4.8475e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2675  
   data-arc span      59947 days (164.13 yr)  
   first obs. used      1855-10-08  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52563  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:00:25  

Additional Information
 Earth MOID = 1.19442 au 
 Jupiter MOID = 2.19184 au 
 T_jup = 3.370 
[ 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 7.29   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 22
magnitude slope G 0.24   n/a PDS3 (MPC 17257) Fit
diameter diameter 108.35 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 22
rotation period rot_per 7.3335 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Zappla, V.; Di Martino, M.; Scaltriti, F.; Burchi, R.; Milano, L.; et al. (1983) Astron. Astrophys. 123, 326-330. (Lead author's name spelled incorrectly in ADS entry)]
[Zeigler, K.W.; Florence, W.B. (1985) Minor Planet Bull. 12, 21-23.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1826   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 22
B-V BV 0.843   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=11; phase (min.=9.22, mean=15.70, max.=24.73) deg.
U-B UB 0.414   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=9.22, mean=16.14, max.=24.73) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

37 Fides          Discovered 1855-Oct-05 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1925 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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