Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .124520531172759 3.2469e-08  
a 2.23397540668944 6.0767e-09 au
q 1.955799602421591 7.2233e-08 au
i 6.791167392679561 4.4311e-06 deg
node 30.11934496980768 3.2331e-05 deg
peri 50.53249556211227 3.7813e-05 deg
M 195.5683074639116 2.0759e-05 deg
tp 2459157.556228982046
(2020-Nov-04.05622898)
7.1241e-05 TDB
period 1219.596048307557
3.34
4.9762e-06
1.362e-08
d
yr
n .2951797035580549 1.2044e-09 deg/d
Q 2.51215121095729 6.8334e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2333  
   data-arc span      32468 days (88.89 yr)  
   first obs. used      1931-01-12  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44223  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:04:16  

Additional Information
 Earth MOID = .978759 au 
 Jupiter MOID = 2.70986 au 
 T_jup = 3.620 
[ 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-January); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-17 13:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin