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JPL Small-Body Database Browser
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1757 Porvoo (1939 FC)
Classification: Main-belt Asteroid          SPK-ID: 2001757
[ 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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1267795886463262 3.1923e-08  
a 2.350683160421756 6.6391e-09 au
q 2.052664516305639 7.4613e-08 au
i 3.974914009230103 3.6237e-06 deg
node 39.3909971315372 5.4861e-05 deg
peri 149.2344121821226 5.6956e-05 deg
M 176.6073615860865 1.5556e-05 deg
tp 2458354.703223592995
(2018-Aug-24.20322359)		 5.6414e-05 TDB
period 1316.405145394787
3.60		 5.5769e-06
1.527e-08		 d
yr
n .2734720395612223 1.1586e-09 deg/d
Q 2.648701804537871 7.4808e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2227  
   data-arc span      29498 days (80.76 yr)  
   first obs. used      1939-03-17  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49525  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:03:47  

Additional Information
 Earth MOID = 1.05419 au 
 Jupiter MOID = 2.30672 au 
 T_jup = 3.544 
[ 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 13.4   n/a MPO492771  
diameter diameter 10.220 km 2.353 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 4.89 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Binzel, R.P.; Mulholland, J.D. (1983) Icarus 56, 519-533.]
geometric albedo albedo 0.068   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

1757 Porvoo           Discovered 1939 Mar. 17 by Y. Vaisala at Turku.
Named for the second oldest (after Turku) town in Finland. At the Porvoo Diet in 1809 the Russian czar confirmed that Finland was annexed to the Russian empire as an autonomous nation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5449Last Updated: 2006-03-21

[ show close-approach data ]
Alternate Designations
 1939 FC = 1964 BB = 1968 FK 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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