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338847 (2003 XZ21)
Classification: Mars-crossing Asteroid          SPK-ID: 2338847
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3238655380874059 7.1747e-08  
a 2.107194764576017 1.4006e-08 au
q 1.424746998291641 1.59e-07 au
i 5.099346044794138 3.1239e-06 deg
node 122.398714728994 3.8623e-05 deg
peri 193.3734343669904 3.9728e-05 deg
M 352.3946706425381 6.3178e-06 deg
tp 2459420.103204567569
(2021-Jul-24.60320457)
1.9472e-05 TDB
period 1117.26307237277
3.06
1.1139e-05
3.05e-08
d
yr
n .3222159658740494 3.2126e-09 deg/d
Q 2.789642530860394 1.8542e-08 au
  Orbit Determination Parameters
   # obs. used (total)      768  
   data-arc span      6447 days (17.65 yr)  
   first obs. used      2003-12-14  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44071  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 04:22:35  

Additional Information
 Earth MOID = .411039 au 
 Jupiter MOID = 2.52204 au 
 T_jup = 3.669 
[ 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 16.91   n/a MPO638826  
rotation period rot_per 22.6106 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

338847 (2003 XZ21)          Discovered 2003-Dec-14 by NEAT at Palomar
Reference: 20121029/Numbers.arcLast Updated: 2012-11-08

[ 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
1911-Jun-12 18:36 00:04 Mars 0.0634292470261635 0.0634193151753437 0.0634391792539853 3.85890524849366 3.85773543034538 2419200.274773135 4.32093587131238 552.097775202661 12.5251801204938 -26.2524340456018 299482.726147418 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
1917-Aug-30 18:48 00:02 Earth 0.49905873437555 0.49905264003719 0.499064831488491 2.630352815385 2.62832226227051 2421471.283532565 1.51709214014708 1882.40329458265 11.7537059351613 -80.7261653242872 1310129.36018508 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
1920-Aug-06 11:02 00:01 Earth 0.411405411648708 0.411404339162051 0.411406484233397 2.61256255557884 2.61008238328877 2422542.959879076 1.43094497083154 362.440623056906 25.0232604874011 82.4772847390783 1450451.17600069 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
1923-Jul-15 11:14 00:01 Earth 0.469516006019756 0.46951122155262 0.469520791022191 2.82178882048419 2.81977698579615 2423615.968199935 1.43657441400926 826.302960375437 6.41860751069289 -73.2353028569999 1829851.7063345 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
1969-Aug-30 05:44 < 00:01 Earth 0.489014038957905 0.489010377926903 0.489017701616045 2.56369391880287 2.56156771453735 2440463.738909066 0.898896787776025 1421.59573599797 11.0576374761707 -82.6433491893266 1273911.08058218 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
1972-Aug-06 04:14 < 00:01 Earth 0.412088696520908 0.41208807230661 0.412089320755467 2.61896411891323 2.6164941189277 2441535.676646374 0.796565763762222 213.395536345495 22.7394814800315 84.242462362546 1456618.31048617 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
1975-Jul-14 00:58 < 00:01 Earth 0.481995002292954 0.48199229913689 0.481997705574611 2.87205783422431 2.8701324285874 2442607.540278933 0.785577603065896 411.338479215653 6.93996065391351 -70.9105569366495 1880119.95724082 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2021-Aug-23 00:12 < 00:01 Earth 0.451468998498608 0.451468486772802 0.451469510292677 2.49187182219031 2.48950227555343 2459449.508471092 0.0434522377277124 291.560613298574 7.6125514869554 -85.2186717220346 1225712.86367973 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2024-Jul-30 08:30 < 00:01 Earth 0.4186509757473 0.41865051043005 0.418651441079947 2.67125541556883 2.66887178666705 2460521.854275624 0.0652278190433873 131.188292876677 4.46175971817767 -80.0143057693337 1569302.66029894 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2073-Aug-20 02:51 < 00:01 Earth 0.436286553716499 0.436284687389694 0.43628842016604 2.4881567588499 2.48570104839781 2478439.618411972 0.923753142970799 389.651895301905 24.4527069978396 -76.6322116082414 1350954.60944741 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2076-Jul-26 18:53 < 00:01 Earth 0.430583780547551 0.430581496233273 0.430586065324495 2.71023750469508 2.70795332435589 2479511.286974247 0.909301545361262 713.917268939613 4.84267017492794 -80.8350598797453 1672376.7617324 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2116-May-06 19:23 00:07 Mars 0.0902187368534471 0.0902082525327846 0.0902292211877971 3.70496032300847 3.70410372689997 2494039.307394200 6.70809279281741 525.742338551708 13.9337478465763 -6.14350848021226 85191.2435580529 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2125-Aug-17 11:12 00:01 Earth 0.423006509792464 0.423004297909634 0.423008721675799 2.51004133064689 2.50753059091525 2497428.966597742 1.44662454926054 124.091526754043 101.758395745237 -52.7112197527554 1287423.87274625 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2128-Jul-25 10:11 00:01 Earth 0.436601776073503 0.436597831715356 0.436605721467601 2.72886779772065 2.72663050695926 2498501.924390890 1.38364999131165 1079.34480631398 4.74273944453831 -79.5112897756093 1708730.52068294 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2140-Nov-11 17:59 00:06 Mars 0.041237260440607 0.041231798091004 0.0412427237263413 3.35892908990668 3.35686157222379 2502994.249497138 6.31768230277397 412.914797460289 13.6374985028152 48.7558952251212 364855.876901232 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2165-May-08 10:21 00:11 Mars 0.0415949023396667 0.0415826340095133 0.041607176306527 3.5319265387194 3.52997725846918 2511937.931539767 10.7213304069363 978.779305332028 12.4801325151422 -51.321397683261 384242.807229095 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2177-Aug-24 21:18 00:05 Earth 0.445767024115258 0.445752407033412 0.445781664574616 2.45971055363028 2.45727927291878 2516429.387733302 5.4788907601323 5145.80641569743 13.3514694025008 -81.8476286316711 1299885.36275109 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22
2180-Aug-01 17:01 00:06 Earth 0.418415954787843 0.418406982790015 0.418424944925948 2.65875735817477 2.6563611686661 2517502.208925829 5.90694449956774 4369.75637841777 5.89542293660655 -84.1261138720942 1626997.98010242 T 25 CATAB v2.0g-lin.ifort 2021-Aug-25 04:22:37 2021-Aug-25 04:22

Alternate Designations
 2003 XZ21 = 2008 CH92 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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