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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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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 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
(2021-Dec-22.77942135)
4.4862e-05 TDB
period 1197.538468433939
3.28
4.7877e-06
1.311e-08
d
yr
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1301299379751613 4.5557e-08  
q 1.920292065126094 1.0057e-07 au
tp 2457174.243349119249
(2015-May-31.74334912)
4.2771e-05 TDB
node 44.04659371236149 3.4693e-05 deg
peri 334.2948994767341 3.6686e-05 deg
i 5.210745573471553 4.3561e-06 deg
  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
 Jupiter MOID = 2.96094 au 
 T_jup = 3.644 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.075451221333941E-15 -4.57573056836145E-15 5.379553684645141E-13 1.031667286628068E-14 8.940187778380171E-14 -2.348137803119438E-16
q -4.57573056836145E-15 1.011433835098563E-14 -1.156317966973749E-12 -2.303225941218649E-14 -1.894831038623569E-13 5.578889951931297E-16
tp 5.379553684645141E-13 -1.156317966973749E-12 1.829325008734811E-9 3.550004029468738E-12 5.141750235168572E-10 -1.139956158486944E-12
node 1.031667286628068E-14 -2.303225941218649E-14 3.550004029468738E-12 1.203570183240497E-9 -1.197325486618249E-9 -3.254093982794648E-11
peri 8.940187778380171E-14 -1.894831038623569E-13 5.141750235168572E-10 -1.197325486618249E-9 1.345889639116298E-9 3.206251759763597E-11
i -2.348137803119438E-16 5.578889951931297E-16 -1.139956158486944E-12 -3.254093982794648E-11 3.206251759763597E-11 1.897562175879525E-11

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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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
(days_HH:MM)
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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