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17981 (1999 JZ56)
Classification: Main-belt Asteroid          SPK-ID: 2017981
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07424981665547524 2.7969e-08  
a 3.158252877195232 1.4699e-08 au
q 2.923753180111859 8.6357e-08 au
i 1.500348413872818 3.5207e-06 deg
node 42.63459407272245 0.00012645 deg
peri 46.82390976646447 0.00012902 deg
M 120.6947655646438 2.5689e-05 deg
tp 2458709.186756348642
(2019-Aug-13.68675635)
0.00014536 TDB
period 2050.070411562003
5.61
1.4312e-05
3.918e-08
d
yr
n .1756037246182713 1.226e-09 deg/d
Q 3.392752574278605 1.5791e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2642  
   data-arc span      15213 days (41.65 yr)  
   first obs. used      1979-11-14  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48214  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:28:43  

Additional Information
 Earth MOID = 1.94055 au 
 Jupiter MOID = 1.74919 au 
 T_jup = 3.201 
[ 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 13.26   n/a MPO636335  
diameter diameter 9.965 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.134 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.070   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17981 (1999 JZ56)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/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
1928-Aug-16 22:25 00:02 Jupiter 1.95706528828038 1.95706469758459 1.95706587897672 3.9180017552788 3.80593391927616 2425475.433852615 2.04560698036783 75.410247891221 15.4038761140406 74.4461756938509 4361863.75792374 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
1939-Apr-16 04:32 00:02 Jupiter 1.83108587991363 1.83108545796901 1.83108630185867 3.22533992690536 3.07858067127457 2429369.689054470 1.82563703837027 83.3862951846587 11.769017671511 84.7028487583707 3992350.19249312 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
1949-Dec-12 04:30 00:02 Jupiter 1.80912109867263 1.80912081745358 1.80912137989163 2.84870780927177 2.67931801259292 2433262.687601571 1.55408012396619 49.3053945374453 8.42581900924032 -87.1310221799227 4446665.12482899 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
1960-Aug-14 22:46 00:01 Jupiter 1.90715303910865 1.90715271941352 1.90715335880378 2.9303969587983 2.77470138408967 2437161.448498589 1.26339055468 34.5675091972836 11.4872067535037 86.9328250918571 5047853.02379419 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2035-Oct-12 05:08 < 00:01 Jupiter 1.99967194760369 1.9996716251596 1.99967227004778 4.08516937550483 3.98013157555851 2464612.713959970 0.465491066838298 30.2284184555136 13.6755894737646 88.1695037004696 5064507.03803645 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2046-Jun-10 05:07 < 00:01 Jupiter 1.85037297436064 1.85037264998813 1.85037329873305 3.35379998896866 3.21441424352753 2468506.713214436 0.712962027314691 43.8432107241243 11.7653147183479 89.6629166628407 4327777.2936648 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2057-Feb-03 07:36 < 00:01 Jupiter 1.79852091127683 1.79852059596992 1.79852122658375 2.89061206144335 2.72281618617923 2472397.816678126 0.965638146309399 45.7376475876941 9.3620673681479 -84.1168878002065 4511631.93440325 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2067-Oct-04 12:11 00:01 Jupiter 1.87064512834102 1.87064467910942 1.87064557757252 2.87470616724383 2.71262631750453 2476293.007432118 1.21105023935127 35.7981028698512 16.2365720843505 -85.2764603296157 3987372.79418156 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2153-Aug-02 10:39 00:03 Jupiter 1.87346408743795 1.87346335401555 1.87346482086289 3.48589315806246 3.35368748196771 2507640.943670975 3.2087988724219 133.899963618274 13.824239088507 79.487986304104 4035677.14447211 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2164-Mar-27 02:09 00:03 Jupiter 1.79088043042785 1.79088013265076 1.79088072820494 2.94019265874579 2.77467192084827 2511530.589751344 3.46871584139997 141.55730582468 8.96279829649612 -87.7873359909137 4279129.9898968 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2174-Nov-23 05:48 00:04 Jupiter 1.83857730685209 1.8385765023888 1.83857811131579 2.83695323185387 2.66962817197305 2515423.741357860 3.68023701915164 68.9005424944055 17.8293920140313 -65.2043556784243 4030491.16507146 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29
2185-Jul-28 19:26 00:04 Jupiter 1.98769478487153 1.98769355696601 1.98769601277694 3.16346662091139 3.02576517449781 2519324.309933736 3.84413249339619 62.6396470838581 26.5044657037661 41.4777382263212 2208721.3664052 T 36 CATAB v2.0g-lin.ifort 2021-Aug-25 14:29:04 2021-Aug-25 14:29

Alternate Designations
 1999 JZ56 = 1979 VV2 = 1990 TV7 = 1998 FK20 = 2000 NP25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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