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20997 (1986 PL1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020997
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543078614105856 3.5643e-08  
a 3.211234349841541 2.0639e-08 au
q 2.715715644829281 1.1938e-07 au
i 6.304720513171701 3.999e-06 deg
node 128.2173511008102 4.001e-05 deg
peri 180.4687691393134 4.2401e-05 deg
M 326.1550990068207 1.4975e-05 deg
tp 2459198.104656847717
(2020-Dec-14.60465685)
8.794e-05 TDB
period 2101.872789626849
5.75
2.0263e-05
5.548e-08
d
yr
n .1712758268610118 1.6512e-09 deg/d
Q 3.706753054853802 2.3823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1575  
   data-arc span      12486 days (34.18 yr)  
   first obs. used      1986-08-01  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53287  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:59:30  

Additional Information
 Earth MOID = 1.70106 au 
 Jupiter MOID = 1.56356 au 
 T_jup = 3.163 
[ 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 13.2   n/a MPO435895  
diameter diameter 12.205 km 1.755 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.068   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20997 (1986 PL1)          Discovered 1986-Aug-01 by Helin, E. F. at Palomar
Reference: 20010208/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
1907-Jan-06 00:35 00:04 Jupiter 1.67038218505369 1.67038179598746 1.67038257411992 2.32003738474728 2.09007352487658 2417581.524320363 3.83852487494004 89.1838292972125 14.2348131494496 -88.1104050022242 2998505.5522108 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
1918-Aug-20 21:50 00:03 Jupiter 1.66733093349874 1.66733051428133 1.66733135271606 2.29429872499108 2.06101542119002 2421826.410022342 3.13285102306864 55.6870154476731 14.3482194760413 89.975247422747 2823104.0813857 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
1930-Mar-22 07:03 00:03 Jupiter 1.67744833713839 1.67744780954666 1.67744886472993 2.31628375572952 2.08692990413112 2426057.793423327 2.59614853510557 60.7672979816797 13.4850659679702 -89.1481785072145 2408261.51571071 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
1941-Oct-02 03:24 00:02 Jupiter 1.71318921784912 1.71318861747989 1.71318981821845 2.44500011081919 2.23365174801209 2430269.641693568 2.17194848905354 77.3862960921302 12.4451416603445 -88.6707625662024 2514223.94564217 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
1953-Mar-18 23:45 00:02 Jupiter 1.77480685967928 1.77480623738638 1.77480748197247 2.73528150752711 2.55485214802757 2434455.489720294 1.80731171046898 83.6350382159158 14.3356745638962 -86.4206420234902 2816086.34096466 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
1964-Aug-04 10:24 00:01 Jupiter 1.8646358741115 1.86463528784612 1.86463646037721 3.24810514320684 3.10510458827782 2438611.933224298 1.45431220644693 78.1161708775886 17.441430260284 -83.2193552476347 3200842.06784828 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
1975-Nov-27 16:34 00:01 Jupiter 1.97366351706473 1.9736630090312 1.97366402509838 3.96155167795331 3.85169658053055 2442744.190443935 1.10083166995368 66.1765698756869 18.8414864008164 -82.0304192189626 3665467.70831248 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
2123-Jan-16 07:08 00:03 Jupiter 1.97873705790899 1.97873573349761 1.97873838232398 3.00948737261265 2.86371958623341 2496484.797141502 2.96765785769093 160.541458324424 14.4367440737654 -71.9912079698444 2972561.72854595 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
2134-Jul-28 12:46 00:03 Jupiter 1.90733612691898 1.90733473764123 1.90733751620192 2.83974613103704 2.67880286391624 2500696.031706877 3.31414427171641 184.655911785032 13.2455989485518 -73.825607326987 2953567.75694446 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
2146-Feb-21 01:53 00:04 Jupiter 1.84839805551873 1.84839666864452 1.84839944240019 2.72294996475211 2.54911021476492 2504921.578568091 3.71339916214086 210.2086270321 12.3487379250056 -76.0250550717536 2967953.76893815 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
2157-Sep-28 18:16 00:04 Jupiter 1.80339305152983 1.80339171780986 1.80339438525943 2.64807751644986 2.46433543478106 2509159.261378661 4.21201666415218 237.499833815932 11.8517406338649 -78.2452894249666 3004972.82279779 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
2169-May-13 07:20 00:05 Jupiter 1.77019827493848 1.77019704649812 1.77019950339152 2.6038365973943 2.41308612323277 2513403.805765408 4.86680383968564 266.758660718247 11.6696374488517 -80.4540992297559 3066106.4662358 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
2180-Dec-28 18:24 00:06 Jupiter 1.75522918686007 1.75522813646054 1.75523023727515 2.59998818460267 2.40723841246164 2517651.266810200 5.73293050897485 294.635924994209 11.7127172337622 -82.6198525154498 3179743.29654438 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
2192-Aug-12 18:25 00:07 Jupiter 1.75099886720008 1.75099812676318 1.75099960765311 2.62176330283326 2.43026115869879 2521896.267274354 6.8824269979471 316.471239424307 11.8025116679634 -85.173917495843 3347856.95011172 T 29 CATAB v2.0f-lin.ifort 2020-Nov-13 01:59:34 2020-Nov-13 01:59
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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