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1508 Kemi (1938 UP)
Classification: Mars-crossing Asteroid          SPK-ID: 2001508
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .417794140113126 3.4292e-08  
a 2.772086010176653 9.1899e-09 au
q 1.613924719235272 9.4185e-08 au
i 28.67739063120159 7.3732e-06 deg
node 13.99092666891252 9.0057e-06 deg
peri 93.23566483873108 1.2392e-05 deg
M 207.3843597406774 7.9116e-06 deg
tp 2459715.169125916708
3.9077e-05 TDB
period 1685.80942879017
n .2135472692535335 1.0619e-09 deg/d
Q 3.930247301118034 1.3029e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1375  
   data-arc span      30763 days (84.22 yr)  
   first obs. used      1935-03-28  
   last obs. used      2019-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46807  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:56:49  

Additional Information
 Earth MOID = .871631 au 
 Jupiter MOID = 2.14042 au 
 T_jup = 3.041 
[ 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 12.0   n/a MPO473784  
rotation period rot_per 9.196 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Sarneczky, K.; Szabo, G.; Kiss, L.L. (1999) Astron. Astrophys. Suppl. Ser. 137, 363-368.]
[Jamieson, Q.; Klinglesmith III, D.A. (2004) Minor Planet Bull. 31, 88-89.]
[Koff, R.A. (2004) Minor Planet Bull. 31, 58-60.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Behrend, R. (2018) Observatoire de Geneve web site,]
B-V BV 0.645   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.70 deg.
U-B UB 0.249   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.70 deg.
Tholen spectral type spec_T BCF   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1508 Kemi (1938 UP)          Discovered 1938-Oct-21 by Alikoski, H. at Turku
Independent discovery Oct. 30, designated 1938 UO, by G. Kulin, Budapest.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1938 UP = 1935 FA = 1938 UO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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