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6801 Strekov (1995 UM1)
Classification: Main-belt Asteroid          SPK-ID: 2006801
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.

Note: If the applet is not working, here are some notes that might help.
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1305208617304526 4.5632e-08  
a 2.206957809581191 5.8822e-09 au
q 1.918903774471902 1.0076e-07 au
i 5.212327153666543 4.3585e-06 deg
node 44.0133831385814 3.4668e-05 deg
peri 334.6847298995453 3.6647e-05 deg
M 188.414203717051 1.327e-05 deg
tp 2459571.279421349168
4.4862e-05 TDB
period 1197.538468433939
n .3006166478065495 1.2019e-09 deg/d
Q 2.49501184469048 6.65e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2220  
   data-arc span      17417 days (47.69 yr)  
   first obs. used      1972-10-09  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43712  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:34:37  

Additional Information
 Earth MOID = .922809 au 
 Jupiter MOID = 2.96094 au 
 T_jup = 3.644 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6   n/a MPO416787  
diameter diameter 4.868 km 0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 6.15 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:
[Carbo, L.; Kragh, K.; Krotz, J.; Meiers, A.; et al. (2009) Minor Planet Bull. 36, 91-94.]
[Rowe, B. (2019) Minor Planet Bull. 46, 353-356.]
geometric albedo albedo 0.297   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

6801 Strekov (1995 UM1)          Discovered 1995-Oct-22 by Moravec, Z. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2144-Jun-16 08:38 < 00:01 Vesta 0.0373251173867361 0.0373159504784935 0.0373342866820803 4.02425530651263 4.02425451436172 2504306.859407108 0.371032516181481 653.867156091548 33.9896644668558 -45.9921915610829 117809.674046984 T 25 CATAB v2.0f-lin.ifort 2020-Jun-23 16:34:50 2020-Jun-23 16:34

Alternate Designations
 1995 UM1 = 1972 TR9 = 1985 QH = 1987 DJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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