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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165921401850497 2.6542e-08  
a 2.375714276207854 6.375e-09 au
q 2.098724664276604 6.3883e-08 au
i 5.659076410510567 3.8922e-06 deg
node 331.6143223116233 3.06e-05 deg
peri 91.26733301634823 3.5489e-05 deg
M 229.7440391975522 1.8515e-05 deg
tp 2459484.432560751034
6.9563e-05 TDB
period 1337.487519166942
n .2691613901744871 1.0834e-09 deg/d
Q 2.652703888139104 7.1183e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2383  
   data-arc span      29233 days (80.04 yr)  
   first obs. used      1940-09-08  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41872  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:35:08  

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] (  
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)]
[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] (  

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 ]
FirstGov 2020-Oct-24 10:20 UT
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