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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1165921389690969 2.6235e-08  
a 2.375714276053083 6.3522e-09 au
q 2.098724667028635 6.3234e-08 au
i 5.65907622620393 3.8704e-06 deg
node 331.6143197911967 3.0078e-05 deg
peri 91.26733615799876 3.4958e-05 deg
M 229.7440387420001 1.8413e-05 deg
tp 2459484.432562396231
(2021-Sep-26.93256240)
6.9205e-05 TDB
period 1337.487519036242
3.66
5.3643e-06
1.469e-08
d
yr
n .2691613902007897 1.0795e-09 deg/d
Q 2.652703885077532 7.0928e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2455  
   data-arc span      29271 days (80.14 yr)  
   first obs. used      1940-09-08  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41401  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:23  

Additional Information
 Earth MOID = 1.12085 au 
 Jupiter MOID = 2.61912 au 
 T_jup = 3.526 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456830.5 (2014-Jun-22.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1170987221002072 2.6308e-08  
q 2.096090706765796 6.3394e-08 au
tp 2456812.632243502870
(2014-Jun-04.13224350)
6.4979e-05 TDB
node 331.6921332161771 3.0105e-05 deg
peri 91.55165067060254 3.4907e-05 deg
i 5.658205643996973 3.8691e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2455  
   data-arc span      29271 days (80.14 yr)  
   first obs. used      1940-09-08  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41401  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:16:23  

Additional Information
 Jupiter MOID = 2.61912 au 
 T_jup = 3.526 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.921240509514535E-16 -1.661469862287454E-15 -1.905953858449488E-13 2.909981811111324E-15 -5.417351593353238E-14 -6.860249285693186E-16
q -1.661469862287454E-15 4.018781006411909E-15 5.421367101812229E-13 -7.25295734655426E-15 1.525474688355225E-13 1.771715382564715E-15
tp -1.905953858449488E-13 5.421367101812229E-13 4.222220672459063E-9 -2.460340525579125E-12 1.154575794303854E-9 1.92656765779582E-12
node 2.909981811111324E-15 -7.25295734655426E-15 -2.460340525579125E-12 9.062968474669288E-10 -9.022386938490849E-10 6.753328904259435E-12
peri -5.417351593353238E-14 1.525474688355225E-13 1.154575794303854E-9 -9.022386938490849E-10 1.218516287329026E-9 -6.20190130973937E-12
i -6.860249285693186E-16 1.771715382564715E-15 1.92656765779582E-12 6.753328904259435E-12 -6.20190130973937E-12 1.496980499757172E-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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