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37 Fides (A855 TB)
Classification: Main-belt Asteroid          SPK-ID: 2000037
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 134 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175796909714646 3.0426e-08  
a 2.641154838065287 3.7051e-09 au
q 2.176847979455523 8.0678e-08 au
i 3.071338528453117 3.7003e-06 deg
node 7.25907019752632 6.5834e-05 deg
peri 62.65758517788183 6.6742e-05 deg
M 164.4305520939987 1.1461e-05 deg
tp 2458680.407319093409
(2019-Jul-15.90731909)
4.9493e-05 TDB
period 1567.794803601962
4.29
3.299e-06
9.032e-09
d
yr
n .2296218862142614 4.8318e-10 deg/d
Q 3.10546169667505 4.3564e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3150  
   data-arc span      60571 days (165.83 yr)  
   first obs. used      1855-10-08  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51759  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:07:42  

Additional Information
 Earth MOID = 1.19294 au 
 Jupiter MOID = 2.19444 au 
 T_jup = 3.371 
[ 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 7.39   n/a MPO636060 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. 2020-October); Warner et al., 2009 Published Reference List:
[Zappala, 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]
[Behrend, R. (2020) 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 (A855 TB)          Discovered 1855-Oct-05 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A855 TB = 1925 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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