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1697 Koskenniemi (1940 RM)
Classification: Main-belt Asteroid          SPK-ID: 2001697
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165921437569935 2.7561e-08  
a 2.37571427663325 6.4534e-09 au
q 2.098724656166484 6.6045e-08 au
i 5.659077835183875 4.0004e-06 deg
node 331.6143360980743 3.1977e-05 deg
peri 91.26731671417521 3.7049e-05 deg
M 229.7440412236565 1.8969e-05 deg
tp 2459484.432553353544
(2021-Sep-26.93255335)
7.1166e-05 TDB
period 1337.487519526178
3.66
5.4498e-06
1.492e-08
d
yr
n .269161390102193 1.0967e-09 deg/d
Q 2.652703897100015 7.2059e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2335  
   data-arc span      29187 days (79.91 yr)  
   first obs. used      1940-09-08  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42002  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:39:36  

Additional Information
 Earth MOID = 1.12085 au 
 Jupiter MOID = 2.61912 au 
 T_jup = 3.526 
[ 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 12.9   n/a MPO473787  
diameter diameter 11.245 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 2.3923 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm]
[Stephens, R.D. (2018) Minor Planet Bull. 45, 50-54.]
geometric albedo albedo 0.116   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1697 Koskenniemi           Discovered 1940 Sept. 11 by H. Alikoski at Turku.
Named in memory of Veikko Antero Koskenniemi (1885-1962), the famous Finnish poet, a member of the Academy of Finland, professor of literature at Turku University. In various poems he wrote about the stars, and he was a founder member of the society Torun Ursa for amateur astronomers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5281Last Updated: 2007-10-23

Alternate Designations
 1940 RM = 1951 UC = 1953 GU = 1962 RM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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