Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
85938 (1999 DJ4)
Classification: Apollo [NEO, PHA]          SPK-ID: 2085938
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 120 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4833453381686398 2.8616e-08  
a 1.853326022881171 3.6136e-09 au
q .957529529614931 5.3073e-08 au
i 9.142441381298992 5.1799e-06 deg
node 19.89757856950405 2.431e-05 deg
peri 197.6380258299329 2.4591e-05 deg
M 291.8455889105926 8.7591e-06 deg
tp 2459570.968742665036
(2021-Dec-22.46874266)
2.2921e-05 TDB
period 921.565403551332
2.52
2.6953e-06
7.379e-09
d
yr
n .3906396644369557 1.1425e-09 deg/d
Q 2.749122516147411 5.3603e-09 au
  Orbit Determination Parameters
   # obs. used (total)      627  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      7395 days (20.25 yr)  
   first obs. used      1999-02-24  
   last obs. used      2019-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49451  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:15:55  

Additional Information
 Earth MOID = .0222149 au 
 Jupiter MOID = 2.23386 au 
 T_jup = 3.839 
[ 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 18.6   n/a MPO186590  
rotation period rot_per 2.5141 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; et al. (2004) IAUC 8316. (1999 DJ4)]
[Pravec, P.; et al. (2006) Icarus 181, 63-93.]
SMASSII spectral type spec_B Sq   n/a Binzel et al. (2001) Icarus 151, 139-149  

85938 (1999 DJ4)          Discovered 1999-Feb-24 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ 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
1931-Feb-20 22:13 00:01 Earth 0.486843717393455 0.486828415414359 0.486859019379248 23.361489017319 23.3612547431295 2426393.425782071 1.18003280487058 768.353305650642 9.01649713254704 -6.74339357552441 854689.332466663 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
1936-Mar-07 15:51 < 00:01 Earth 0.228809635752671 0.228800543901177 0.22881872762145 15.815363457979 15.8146271339387 2428235.160544446 0.945220386142416 464.102560303084 8.57688416920447 -12.3558761226721 754665.852270798 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
1941-Apr-03 23:56 < 00:01 Earth 0.026323875777622 0.0263236914931038 0.0263240601085611 9.74822250176514 9.73783362557348 2430088.496959182 0.641239383181125 106.519799918705 7.85205489224127 87.4175943111258 499859.274640727 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
1946-May-22 09:49 < 00:01 Earth 0.114439034246745 0.114438065445026 0.11444000309292 9.66188965606324 9.65947958266987 2431962.909088414 0.730840060862542 126.666275774956 13.418656325459 68.3825726206318 1081661.04170581 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
1951-Jun-23 00:31 < 00:01 Earth 0.265481638662242 0.26547963569511 0.265483641636377 15.3410264919283 15.3403722585346 2433820.521264565 0.261992729947498 121.332933430889 16.4604204695245 34.9683065827918 1219406.24039608 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
1994-Feb-26 12:00 < 00:01 Earth 0.382974798273678 0.382974227860202 0.382975368687175 20.4479126156416 20.4475723666917 2449410.000231443 0.0505243124492807 28.7816581164327 8.75578344866164 -9.23027024581635 1971478.97172903 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
1999-Mar-15 09:14 < 00:01 Earth 0.144361192450235 0.144360880210146 0.144361504690357 13.454406443203 13.4530345525564 2451252.884426859 0.0474351529568257 16.1307910494519 8.45860426710322 -17.8915747327119 1324762.98924705 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2004-Apr-20 12:49 < 00:01 Earth 0.0586460215576226 0.058645914546295 0.0586461285689502 9.06995491703636 9.06494432954675 2453116.034051694 0.0610874298341473 10.1038320762459 5.33384535232204 -89.3446943755718 1421595.5985094 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2009-Jun-12 12:14 < 00:01 Earth 0.181242018306121 0.181241601232453 0.181242435380243 12.2059523688924 12.2047478788199 2454995.009669947 0.0659225457222012 29.7608800593948 15.470632216228 56.8619768381511 1428990.73748808 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2014-Jul-04 18:03 < 00:01 Earth 0.409863491383973 0.409862787475998 0.409864195292135 20.0001564498172 19.9998314049909 2456843.252017382 0.0712620556195624 38.5063875260737 17.4346778385154 27.4626311080003 1928304.81383936 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2052-Feb-29 11:49 < 00:01 Earth 0.35542567688657 0.355423097642856 0.355428256130648 19.6031481600226 19.6027657388124 2470596.992616991 0.234363859311035 129.89199225009 8.81166872786235 -8.06331409024629 830389.261311073 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2057-Mar-22 00:32 < 00:01 Earth 0.0845543220471023 0.0845519079116617 0.0845567361929967 11.7179266421799 11.7152371170085 2472444.522003935 0.447199836127936 129.234133152264 8.45200540087536 -21.3894189131916 512275.098722008 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2062-May-04 23:42 < 00:01 Earth 0.0864513496200865 0.086450555910617 0.0864521433528591 9.07609626280003 9.07269983213247 2474314.487362296 0.669553304873613 83.1781667102012 9.98843764548135 62.3688985741553 1030161.50402338 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2067-Jun-18 15:35 < 00:01 Earth 0.210324242514356 0.210323420999452 0.210325064031341 13.379065409223 13.3781184906924 2476185.149130484 0.154197764010757 54.4810522069318 16.1104369534616 43.6440246453667 1234833.75507561 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2072-Jul-08 03:56 < 00:01 Earth 0.449072852998409 0.449072435070915 0.449073270926057 21.2704436486177 21.2701647015156 2478031.663807293 0.0445699569113273 27.055704963005 14.1127240279483 48.3709971823101 3711678.43029635 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2110-Mar-01 10:33 < 00:01 Earth 0.368586238676138 0.3685789466013 0.368593530753889 20.0765762677171 20.0762161972669 2491780.939920476 0.590963130117466 367.293568029643 8.79223789972174 -8.11335696911981 797238.571344816 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2115-Mar-20 03:28 00:01 Earth 0.113978361156435 0.113970864565556 0.113985857797798 12.6735565626125 12.6717118740755 2493625.644598233 1.10043802360894 392.509745711627 8.47591371700678 -17.7671739527983 558568.673156885 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2120-Apr-28 15:52 00:02 Earth 0.0742380785071325 0.0742348555046796 0.0742413017908786 8.99871289537486 8.99472355111195 2495492.161141508 2.39279084993445 279.166192474632 8.65508496466328 54.8881681737919 951453.394098317 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2125-Jun-17 20:07 < 00:01 Earth 0.194733545895691 0.194730072913863 0.194737018947975 12.7487333972058 12.7476600930091 2497368.338222679 0.77482838500209 253.757808188592 15.6861010854526 47.0851274759386 1183899.68241069 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2130-Jul-08 20:09 < 00:01 Earth 0.423676276284597 0.423673686185774 0.423678866385804 20.5323838163115 20.5320775197822 2499215.339902917 0.240914858802901 138.706197932658 17.3263208765342 21.5634863735043 1235307.86840932 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2168-Mar-02 04:47 00:01 Earth 0.363031827168517 0.363017655769747 0.363045998576325 19.8943983553795 19.8940294280125 2512966.699542339 1.1956697975663 712.416771550396 8.89926387645842 -7.29148720871075 690466.477193237 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2173-Mar-22 14:55 00:02 Earth 0.0918296167195816 0.0918150931167575 0.0918441405808696 12.0283617023056 12.0259492059787 2514813.121666843 2.38450374853124 763.91276611188 8.49892575741575 -18.5622917103609 473761.967335154 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2178-May-05 12:00 00:04 Earth 0.0872555351731261 0.0872504799827815 0.0872605912665947 9.06180529583133 9.05843486501834 2516682.999767303 4.34319846786039 509.77617848662 9.70207953233234 60.3795058577298 1047484.00373878 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2183-Jun-19 21:39 00:01 Earth 0.199035165680553 0.199029429922348 0.199040901610061 12.9247535140387 12.9237177098202 2518554.401927312 1.23588554289343 408.480989681 15.7392388964399 45.6048544367173 1169853.90099751 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
2188-Jul-08 14:55 < 00:01 Earth 0.418357901855407 0.418354749969998 0.418361053743717 20.3395800805355 20.339266949769 2520400.121706496 0.313527110400726 166.60491800509 17.636162403039 19.4897522352733 1082906.0849567 T 120 CATAB v2.0f-lin.ifort 2021-Apr-13 14:15:59 2021-Apr-13 14:16
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-26 07:55 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin