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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 125 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1756452970115087 3.0754e-08  
a 2.642047371689176 4.0247e-09 au
q 2.177984176370355 8.1733e-08 au
i 3.070926851696053 3.7922e-06 deg
node 7.258074506432344 6.801e-05 deg
peri 62.77226728198044 6.8978e-05 deg
M 73.39732612152311 1.1724e-05 deg
tp 2458680.693662923762
(2019-Jul-16.19366292)
5.0911e-05 TDB
period 1568.589585359359
4.29
3.5842e-06
9.813e-09
d
yr
n .2295055401107519 5.2442e-10 deg/d
Q 3.106110567007997 4.7316e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2825  
   data-arc span      60153 days (164.69 yr)  
   first obs. used      1855-10-08  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52291  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:05:44  

Additional Information
 Earth MOID = 1.19434 au 
 Jupiter MOID = 2.19219 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 7.3   n/a MPO502153 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-August); 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 (A855 TB)          Discovered 1855-Oct-05 by Luther, R. at Dusseldorf
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A855 TB = 1925 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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