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1675 Simonida (1938 FB)
Classification: Main-belt Asteroid          SPK-ID: 2001675
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1249194683714425 3.2376e-08  
a 2.232903062818678 5.583e-09 au
q 1.953969999286403 7.2056e-08 au
i 6.790948352046851 4.3119e-06 deg
node 30.09321664285801 3.1438e-05 deg
peri 50.7499687813472 3.6335e-05 deg
M 313.5078647615389 1.8872e-05 deg
tp 2459157.891118850333
(2020-Nov-04.39111885)
6.4072e-05 TDB
period 1218.718015326743
3.34
4.5708e-06
1.251e-08
d
yr
n .2953923676130139 1.1079e-09 deg/d
Q 2.511836126350953 6.2804e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2543  
   data-arc span      32800 days (89.80 yr)  
   first obs. used      1931-01-12  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42765  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:35  

Additional Information
 Earth MOID = .977162 au 
 Jupiter MOID = 2.7085 au 
 T_jup = 3.621 
[ 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 11.8   n/a MPO267714  
diameter diameter 11.08 km 0.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 5.2885 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.2480   0.025 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8

1675 Simonida (1938 FB)          Discovered 1938-Mar-20 by Protitch, M. B. at Belgrade
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 FB = 1931 AZ = 1936 SG = 1941 BD = 1943 VJ = 1951 CL1 = 1953 VD = 1958 FE = 1958 GX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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