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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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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
(2021-Sep-26.93256075)
6.9563e-05 TDB
period 1337.487519166942
3.66
5.3835e-06
1.474e-08
d
yr
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 
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Orbital Elements at Epoch 2456760.5 (2014-Apr-13.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .117025036857883 2.6608e-08  
q 2.096092486255648 6.4023e-08 au
tp 2456812.620708264640
(2014-Jun-04.12070826)
6.5488e-05 TDB
node 331.6934431294458 3.0628e-05 deg
peri 91.546244500459 3.5444e-05 deg
i 5.658214614389571 3.8909e-06 deg
  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
 Jupiter MOID = 2.61912 au 
 T_jup = 3.526 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.079842585883377E-16 -1.697109812199071E-15 -2.21117151930982E-13 3.127639189116162E-15 -6.427878287586436E-14 -6.823316689638457E-16
q -1.697109812199071E-15 4.098939754487414E-15 6.127225134504072E-13 -7.688036634170731E-15 1.757139660251326E-13 1.775291519396319E-15
tp -2.21117151930982E-13 6.127225134504072E-13 4.288618772652942E-9 -1.570623751996295E-12 1.174969259946971E-9 2.01801687911563E-12
node 3.127639189116162E-15 -7.688036634170731E-15 -1.570623751996295E-12 9.380477380943034E-10 -9.335969689418357E-10 9.049157821733102E-12
peri -6.427878287586436E-14 1.757139660251326E-13 1.174969259946971E-9 -9.335969689418357E-10 1.256305546696226E-9 -8.460536090813487E-12
i -6.823316689638457E-16 1.775291519396319E-15 2.01801687911563E-12 9.049157821733102E-12 -8.460536090813487E-12 1.513923410391153E-11

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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