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21964 Kevinhousen (1999 VK213)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021964
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03348540898008438 3.2368e-08  
a 3.21846833876246 2.0112e-08 au
q 3.110696610149547 1.0321e-07 au
i 13.7562719545495 4.3797e-06 deg
node 201.2392855523784 1.5599e-05 deg
peri 264.6824298889297 8.0561e-05 deg
M 218.1171175195034 8.1637e-05 deg
tp 2460227.689007142914
(2023-Oct-10.18900714)
0.00048014 TDB
period 2108.979161827935
5.77
1.9768e-05
5.412e-08
d
yr
n .170698699406766 1.6e-09 deg/d
Q 3.326240067375374 2.0785e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1284  
   data-arc span      12396 days (33.94 yr)  
   first obs. used      1987-08-31  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50307  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:47  

Additional Information
 Earth MOID = 2.16625 au 
 Jupiter MOID = 1.74695 au 
 T_jup = 3.144 
[ 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 13.78   n/a MPO636393  
diameter diameter 8.019 km 0.248 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.109   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21964 Kevinhousen           Discovered 1999 Nov. 13 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Kevin R. Housen (b. 1953) is an associate technical fellow at the Boeing Corporation. A pioneer in the study of shock physics as applied to asteroidal materials, his work has included modeling the production of asteroidal regoliths and developing crater formation and disruptive collision scaling laws.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

[ hide close-approach data ]
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
1988-Mar-09 18:25 < 00:01 Jupiter 1.86465772138468 1.86465715842708 1.86465828434271 5.00774586633371 4.91619942579741 2447230.267422281 0.765031418353329 78.9794212472063 21.1681655508831 77.146243741611 4112956.8486462 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46
1999-May-11 03:02 < 00:01 Jupiter 1.77357004035654 1.7735695752603 1.77357050545277 4.7516512105518 4.65005679283483 2451309.626470290 0.47200124496934 61.4337328419387 21.3864818115781 85.870478477414 3572904.91585498 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46
2010-Jul-12 06:42 < 00:01 Jupiter 1.80871568736558 1.80871519194398 1.80871618278717 4.23191033004397 4.1197650401238 2455389.779294376 0.254103039262184 46.9688879044461 22.8852898143862 -87.9682106115862 3210123.04179536 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46
2021-Aug-23 09:28 < 00:01 Jupiter 1.93551009760856 1.93550955092137 1.93551064429576 3.43371595543004 3.30381000175313 2459449.894495641 0.326657304050313 48.1565811751248 23.96588705154 -79.9977599889341 3157418.33842116 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46
2166-Feb-23 09:10 00:03 Jupiter 1.85550913838888 1.85550757685771 1.85551069993757 4.88694874045316 4.79262837680355 2512228.881810011 3.46689844695166 311.209934203687 22.7444895954429 76.2744535107776 3814669.88268409 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46
2177-Apr-26 21:14 00:04 Jupiter 1.75196361710786 1.75196306611331 1.75196416811157 4.71779712782112 4.61418129081476 2516309.384931341 3.58660929922922 375.03891497771 21.713161123458 88.1152901347847 3508526.8039531 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46
2188-Jul-01 10:58 00:04 Jupiter 1.77947536625662 1.77947419748641 1.7794765350499 4.29590509290095 4.18363589387149 2520392.956721984 4.00942752025425 359.26044975444 22.4662194289139 -80.3464799240093 3225283.92309139 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46
2199-Aug-19 05:42 00:05 Jupiter 1.91395349429609 1.91395150720695 1.91395548139492 3.60226648152499 3.47724334842138 2524458.737578918 4.79591246463391 247.352326460548 26.3797856661281 -62.3704367229118 2688713.15761181 T 24 CATAB v2.0g-lin.ifort 2021-Aug-24 22:46:56 2021-Aug-24 22:46

Alternate Designations
 1999 VK213 = 1987 QD4 = 1990 EG2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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