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18815 (1999 LT8)
Classification: Main-belt Asteroid          SPK-ID: 2018815
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07463159436472601 1.3273e-08  
a 3.16155512741725 1.6329e-08 au
q 2.925603227586126 4.2316e-08 au
i 9.532365075144458 6.6512e-07 deg
node 191.6727400253353 3.6946e-06 deg
peri 47.67132135745396 1.5831e-05 deg
M 305.562290402693 1.3906e-05 deg
tp 2459510.989493562193
(2021-Oct-23.48949356)
7.936e-05 TDB
period 2053.286563840275
5.62
1.5908e-05
4.355e-08
d
yr
n .1753286688472211 1.3584e-09 deg/d
Q 3.397507027248374 1.7548e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2264  
   data-arc span      11090 days (30.36 yr)  
   first obs. used      1990-11-11  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51876  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:05  

Additional Information
 Earth MOID = 1.92365 au 
 Jupiter MOID = 1.60543 au 
 T_jup = 3.179 
[ 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 13.09   n/a E2021B10  
diameter diameter 11.768 km 0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.100   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18815 (1999 LT8)          Discovered 1999-Jun-08 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ 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
1918-Mar-29 12:01 00:02 Jupiter 1.81598660793041 1.81598546624543 1.81598774961551 2.69687784554548 2.51799504750154 2421682.000468092 2.3769871254732 61.7312126101599 11.5803391182636 15.9106460959713 6283430.24713354 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
1928-Oct-27 01:07 00:02 Jupiter 1.60472225574258 1.60472207576606 1.60472243572329 3.15632317435785 2.98441175688059 2425546.546713595 1.9124315639259 156.683817171933 3.52472706418645 85.814398939655 12552153.928058 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
1939-Jun-12 01:30 00:02 Jupiter 1.77828086240066 1.77828005721039 1.77828166759327 3.51222456547412 3.37388361589513 2429426.562670349 1.69309281740883 113.566092486201 7.07233505977522 -70.5938112492475 10240667.5815334 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
2024-Oct-02 20:36 < 00:01 Jupiter 1.75176149824525 1.75176127529817 1.75176172119234 2.67217115269512 2.48464209667241 2460586.358239133 0.309930408719861 12.8156568151645 9.04504138592078 69.0107249930926 8736545.21282823 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
2035-May-09 02:26 < 00:01 Jupiter 1.61997903083107 1.61997887428655 1.61997918737596 3.25506751690197 3.09026604032629 2464456.601647524 0.549902083061552 48.096034483156 3.53906881118669 -84.5354660364526 12778650.6401528 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
2045-Dec-17 17:51 < 00:01 Jupiter 1.86549432110685 1.86549374694899 1.86549489526503 3.71075524161967 3.58630869034603 2468332.244086441 0.841106305076796 51.922901332374 7.51945341448954 -60.1516584227984 9439230.89889017 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
2120-Oct-04 13:22 00:03 Jupiter 1.98473634559903 1.98473521159352 1.98473747960488 2.71466987066575 2.55262530585206 2495651.056634262 2.67168495965516 74.2274355745548 5.50939251685986 -61.5555020240796 7078722.15304261 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
2131-Apr-12 09:27 00:03 Jupiter 1.69850378192345 1.69850287796486 1.69850468588532 2.70524860603901 2.51415893107653 2499492.894043386 2.86654732844204 133.077607051037 6.71327601590659 63.1485574003347 9550818.79984656 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
2141-Nov-21 01:11 00:03 Jupiter 1.64952516955376 1.64952443178109 1.64952590734002 3.37779604831285 3.22219128050388 2503368.549252645 2.98815830691681 247.666468620622 4.29709131850696 -83.1996568356448 12682342.5050805 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48
2152-Jul-02 10:30 00:03 Jupiter 1.94243562676557 1.94243366851873 1.94243758501793 3.92805171717228 3.81542476555061 2507244.937160446 3.35020207580545 193.025898305743 8.79946964581581 -61.4842502540139 8453701.74965729 T 36 CATAB v2.0g-lin.ifort 2021-May-04 02:48:50 2021-May-04 02:48

Alternate Designations
 1999 LT8 = 1990 WJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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