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20002 Tillysmith (1991 EM)
Classification: Main-belt Asteroid          SPK-ID: 2020002
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435151435866916 6.359e-08  
a 3.187909503275696 3.1194e-08 au
q 2.730396213171705 2.0974e-07 au
i 20.24835413732752 6.0733e-06 deg
node 280.3761843175143 2.234e-05 deg
peri 26.43973992166012 3.5132e-05 deg
M 288.1168944400094 3.1031e-05 deg
tp 2459415.627720088183
(2021-Jul-20.12772009)
0.00018198 TDB
period 2079.013950044558
5.69
3.0515e-05
8.355e-08
d
yr
n .1731590112669924 2.5416e-09 deg/d
Q 3.645422793379686 3.5671e-08 au
  Orbit Determination Parameters
   # obs. used (total)      672  
   data-arc span      10692 days (29.27 yr)  
   first obs. used      1991-03-10  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56319  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:38:26  

Additional Information
 Earth MOID = 1.72742 au 
 Jupiter MOID = 1.60022 au 
 T_jup = 3.086 
[ 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 13.5   n/a MPO395194  
diameter diameter 11.700 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20002 Tillysmith           Discovered 1991 Mar. 10 by R. H. McNaught at Siding Spring.
Tilly Smith (b. 1994), in recognising the signs of a tsunami and alerting beachgoers, saved many lives on the island of Phuket in the 2004 Dec. 26 tsunami disaster.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060809/MPCPages.arcLast Updated: 2007-08-08

[ 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
1955-Jun-02 02:03 00:03 Jupiter 1.88660044058596 1.88659748241118 1.88660339876856 5.31269066550632 5.22749910194947 2435260.585485809 2.97454343995058 283.869409864975 91.0379296657897 63.9413449806576 3057805.33658692 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38
1966-Sep-05 23:34 00:02 Jupiter 1.65512524631653 1.65512419096891 1.65512630167657 5.48265312256258 5.38850355435469 2439374.481870452 2.02614614085292 336.690368164327 38.4080885366827 83.8060293695464 3364010.94849228 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38
1977-Dec-22 09:20 00:01 Jupiter 1.63578704424512 1.63578623714901 1.63578785136271 5.47857688925215 5.3832323077133 2443499.888600988 1.47704500249031 358.94090280925 20.8251323560448 -84.548436937447 3191834.0857839 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38
1989-Mar-11 00:15 00:01 Jupiter 1.85409218567849 1.85409078791955 1.85409358344744 5.23981544844319 5.15189159119768 2447596.510278292 1.18160667860251 250.147285633204 28.7337498400566 -75.0990647312071 2882234.0365189 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38
2121-May-10 12:44 00:04 Jupiter 1.82510195771375 1.82509845591001 1.82510545953855 5.32481573988017 5.23693332650508 2495869.030834591 4.01015046364211 384.426435902441 73.855236114536 64.8670875988489 3172096.85827979 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38
2132-Aug-20 04:32 00:04 Jupiter 1.64057256198864 1.64057109388845 1.64057403016679 5.49832019507862 5.40360353675643 2499988.688747386 4.2589375016613 644.637701660302 33.8075586605062 84.1902296796632 3462549.52946299 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38
2143-Dec-03 00:21 00:05 Jupiter 1.67306653183179 1.67306426717041 1.67306879675946 5.51059401187181 5.41794309792602 2504110.514265988 5.19238502456317 1088.09660960697 20.838897178182 -84.1041242803155 3323066.74347535 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38
2155-Feb-07 12:41 00:07 Jupiter 1.93543081658311 1.93542464632114 1.93543698710636 5.25917618414781 5.17529260463055 2508195.028479867 7.24761881724863 1177.19486577454 29.6002078082156 -74.6111890820387 3126051.67236827 T 11 CATAB v2.0f-lin.ifort 2020-Jun-23 18:38:36 2020-Jun-23 18:38

Alternate Designations
 1991 EM = 1998 MP28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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