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21042 (1990 QT7)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021042
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299358402762464 3.4245e-08  
a 3.241276122330679 1.7572e-08 au
q 2.820118185808309 1.1692e-07 au
i .745897858968449 3.8492e-06 deg
node 239.7883187022473 0.00027758 deg
peri 191.6653914525968 0.00027808 deg
M 13.5710583173498 1.4719e-05 deg
tp 2459316.150405809417
(2021-Apr-11.65040581)
8.7189e-05 TDB
period 2131.436858658977
5.84
1.7333e-05
4.746e-08
d
yr
n .1689001475870597 1.3735e-09 deg/d
Q 3.66243405885305 1.9856e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1948  
   data-arc span      11197 days (30.66 yr)  
   first obs. used      1990-08-16  
   last obs. used      2021-04-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:29:58  

Additional Information
 Earth MOID = 1.8345 au 
 Jupiter MOID = 1.61031 au 
 T_jup = 3.170 
[ 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 13.47   n/a E2021B10  
diameter diameter 9.630 km 0.344 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.083   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21042 (1990 QT7)          Discovered 1990-Aug-16 by Elst, E. W. at La Silla
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
1901-Oct-09 11:14 00:05 Jupiter 1.88080642517724 1.88080535367892 1.88080749667534 3.04254515044252 2.89074031524184 2415666.967939713 5.02317527408816 64.3613486578404 20.7770643591127 71.1646590881732 1456815.2104197 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1913-Mar-15 20:11 00:04 Jupiter 1.8202795763336 1.82027888865695 1.82028026400994 2.67467831445139 2.49464488013016 2419842.341039672 4.17261759831212 41.6509667014592 11.3869488993319 -87.8942671990204 1481613.86722918 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1924-Sep-14 11:15 00:03 Jupiter 1.78541706060284 1.78541665664346 1.78541746456212 2.44912778466816 2.24708784102724 2424042.968480464 3.37257345069096 50.9927360157628 7.2221766813631 87.3322441700212 2743961.18375583 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1936-Apr-07 16:47 00:03 Jupiter 1.76429662413764 1.76429631566404 1.76429693261115 2.31215992903274 2.09425452438581 2428266.199312309 2.68180426858047 56.2456398688965 7.28132012891226 84.1855233257925 3630796.10471013 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1947-Nov-15 16:11 00:02 Jupiter 1.75363934248297 1.75363899961945 1.75363968534639 2.23141894105704 2.00330070519604 2432505.174156839 2.10709683928504 56.114689007511 7.30087809605703 83.96890580888 3593968.30236687 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1959-Jul-05 05:36 00:02 Jupiter 1.75626417117143 1.75626378754892 1.75626455479394 2.20103163401983 1.96976324503669 2436754.733339785 1.63087788744595 53.2495131054637 7.08565017496045 85.0021563723076 3386822.94168738 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1971-Feb-24 14:23 00:01 Jupiter 1.7696504227482 1.76965002287265 1.76965082262366 2.20890162525648 1.98039636020357 2441007.099156370 1.23056380671037 49.4230114296303 6.55690002619511 86.0861652661216 3259882.88496956 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1982-Oct-13 17:23 < 00:01 Jupiter 1.79746573828546 1.79746533898852 1.79746613758229 2.26190250151531 2.04297329579453 2445256.224210029 0.88215572708342 45.0909216570904 5.96656776048447 86.5548074446743 3230037.64220502 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
1994-May-24 02:22 < 00:01 Jupiter 1.83606658792765 1.83606619010131 1.83606698575389 2.35908430185866 2.15467624757227 2449496.598315078 0.573109436262427 40.6263113445327 6.37325119992306 86.1077848306869 3254120.65499737 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
2005-Dec-18 04:59 < 00:01 Jupiter 1.88935261307026 1.88935220388106 1.88935302225936 2.51727127456493 2.33238663774722 2453722.707884809 0.321300374645072 36.9225702571851 8.44433424827313 84.0958897001979 3303767.36485357 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
2017-Jun-28 15:22 < 00:01 Jupiter 1.95691234589108 1.9569119012448 1.95691279053725 2.7492550418934 2.58703128655368 2457933.140324424 0.284302947406097 36.2991517520062 11.4017440756014 79.5069923708365 3326843.12659891 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
2164-May-06 08:38 00:02 Jupiter 1.90752019913805 1.90751925238659 1.9075211458907 3.52292099069391 3.39453748155287 2511570.859801248 2.30399394280225 103.988463190134 18.5917727904476 73.3439057463982 3004871.41692044 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
2175-Sep-10 00:12 00:02 Jupiter 1.80250466043517 1.80250384951742 1.80250547135343 2.91065811762312 2.74446758128618 2515714.508638982 2.19581001644071 83.1547715881581 15.2628527731807 79.214497856751 2582491.77697332 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
2187-Feb-12 00:45 00:02 Jupiter 1.72210309534542 1.72210247569015 1.72210371500069 2.48798567050718 2.28174617519331 2519887.531111250 2.07206122750923 63.9727500064475 8.38533759968394 89.147312078354 2329091.98666366 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30
2198-Aug-17 13:31 00:02 Jupiter 1.67653945533939 1.67653901198025 1.67653989869833 2.24960831874082 2.01253474493223 2524092.063321309 1.99931306545951 53.4574842564349 6.43730775551762 -83.8983875660616 2409334.48760832 T 32 CATAB v2.0g-lin.ifort 2021-Jul-08 18:30:10 2021-Jul-08 18:30

Alternate Designations
 1990 QT7 = 1999 EV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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