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
JPL Small-Body Database Browser
Search: [ help ]  
4660 Nereus (1982 DB)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004660
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 125 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3603359277287458 2.7842e-09  
a 1.488743084595746 1.4395e-09 au
q .9522954640581828 4.0067e-09 au
i 1.432103476327154 2.4894e-06 deg
node 314.4055513051823 2.9575e-05 deg
peri 158.0702674692276 3.0708e-05 deg
M 41.94650302552807 5.7875e-06 deg
tp 2458923.192554588343
(2020-Mar-14.69255459)
1.0555e-05 TDB
period 663.4803461747241
1.82
9.6233e-07
2.635e-09
d
yr
n .5425933142941899 7.8699e-10 deg/d
Q 2.025190705133308 1.9583e-09 au
  Orbit Determination Parameters
   # obs. used (total)      717  
   # delay obs. used      16  
   # Doppler obs. used      16  
   data-arc span      14067 days (38.51 yr)  
   first obs. used      1981-09-30  
   last obs. used      2020-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46875  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Apr-06 05:50:33  

Additional Information
 Earth MOID = .00332828 au 
 Jupiter MOID = 3.0963 au 
 T_jup = 4.493 
[ 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 18.4   n/a MPO492806  
diameter diameter 0.33 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
rotation period rot_per 15.1 h n/a LCDB (Rev. 2019-August); 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:
[Ishibashi, Y.; Abe, M.; Takagi, Y. (1998) Lunar and Planetary Sci. XVIX, #1758.]
[Ishibashi, Y.; Abe, M.; Takagi, Y. (2000) Adv. Space Res. 25, 277-280.]
[Brozovic, M.; Ostro, S.J.; Benner, L.A.M.; Giorgini, J.D.; et al. (2009) Icarus 201, 153-166.]
geometric albedo albedo 0.55   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
SMASSII spectral type spec_B Xe   n/a Binzel et al. (2004) Planet. Space Sci. 52, 291-296  

4660 Nereus (1982 DB)          Discovered 1982-Feb-28 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
1900-Jan-29 18:34 00:14 Earth 0.0207758264908436 0.0207634629725666 0.0207881903674336 5.54535874419234 5.5221830435576 2415049.273629888 13.8422239763677 631.424953204928 1.19133296950516 -12.2956369358598 584688.236597508 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1910-Nov-09 02:01 < 00:01 Earth 0.392064049683454 0.392053374455936 0.392074724911864 18.1660669204492 18.1656928108107 2418984.583784665 0.802460979172345 533.130436202736 5.8099797910456 -3.16706613693332 482522.410864783 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1920-Feb-20 07:04 < 00:01 Earth 0.0398320454346364 0.0398292841535861 0.0398348067163207 7.36285214986576 7.3537613549707 2422374.794135019 0.67210299693296 137.921699589055 1.39960368365776 3.70718484648512 240193.299082942 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1930-Nov-28 22:57 < 00:01 Earth 0.101034798402302 0.101030753218972 0.101038843594241 9.23843557478205 9.23558054886598 2426309.456421101 0.595009005879388 207.014750823903 5.94038309105338 -13.0498876439238 483074.79014256 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1937-Dec-26 20:28 < 00:01 Mars 0.0785065709445431 0.0785049813058372 0.0785081606140274 9.77611034357592 9.77573731477063 2428894.353027318 0.0781943452474442 111.039675980026 6.2099766360564 44.5353506404738 1356194.03530153 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1940-Mar-21 22:38 < 00:01 Earth 0.449957507185345 0.449955290364948 0.449959724005741 19.8879770683251 19.8876793171425 2429710.443142236 0.174264145643733 110.541716548594 1.24450654482871 -0.0510323161838325 526767.032384534 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1941-Nov-04 08:04 < 00:01 Earth 0.485050136152293 0.48504829552559 0.485051976778995 20.960568153705 20.960306078828 2430302.836282102 0.140608794489176 91.8020019371682 6.19012454957255 -1.16735009096375 717035.523951457 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1951-Feb-24 02:09 < 00:01 Earth 0.0649302916331466 0.0649291564030604 0.0649314268633177 8.16825971918383 8.16323433716217 2433701.589608047 0.206905083745804 56.7333040467853 3.05910532335773 4.05636000915411 239772.422288598 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1961-Dec-10 21:41 < 00:01 Earth 0.0278958427659169 0.0278944771570467 0.0278972084396563 6.67101186673846 6.65667850798247 2437644.403658852 0.641659363088429 95.829046671563 6.07756286593512 -44.8749900335334 456562.877178347 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1971-Mar-22 05:14 < 00:01 Earth 0.431704037198262 0.43170303867558 0.431705035720944 19.3307320334792 19.3304127462613 2441032.718340973 0.0772318999494695 49.8070767740208 1.16550427443782 1.44705494131917 1634850.20465305 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1980-Aug-06 04:53 < 00:01 Mars 0.0619393070272476 0.0619390966593638 0.0619395173951737 11.527768100118 11.5273671390869 2444457.703603422 0.0129012553381379 12.2574261260774 9.59251708823623 56.1924852864823 896530.016025499 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1982-Jan-23 20:16 < 00:01 Earth 0.0277118774740321 0.0277117157406633 0.0277120392077128 5.40845587148785 5.39064895814275 2444993.344396170 0.327528037236484 9.41838438797606 2.3950163133237 -32.2309883801202 1062207.82657364 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1992-Nov-05 21:56 < 00:01 Earth 0.459414477174343 0.459414196844054 0.459414757504633 20.1733240796374 20.1730365826427 2448932.413967222 0.0201162255793822 14.153777532292 6.31004582707371 10.0893319814137 4447711.04833285 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
1996-Apr-14 01:54 < 00:01 Mars 0.0754559258291358 0.075455757368771 0.0754560942895264 11.5501096773147 11.5497811791842 2450187.579327582 0.0108504810098952 8.83319485071069 5.34581639200204 -22.8538702524836 1419735.57927296 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2002-Jan-22 12:23 < 00:01 Earth 0.029023946407067 0.029023946220681 0.0290239465934777 5.41884857162253 5.40188062221082 2452297.015821770 0.000124798408977985 2.97763700505331 0.00838061060865672 -89.9248832504538 307709125.798263 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2011-Mar-22 21:23 < 00:01 Earth 0.444989835746628 0.444989574996333 0.444990096496924 19.7152470337318 19.7149433207277 2455643.390898335 0.024301413490676 13.0052926249629 1.23447047378021 1.23555920820758 4522627.70861534 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2021-Dec-11 13:51 < 00:01 Earth 0.0262991018645712 0.0262987567913866 0.0262994469412764 6.57823943030693 6.56281990305067 2459560.077138093 0.167962186073198 23.6886577656959 6.1783400713805 -45.4395954680609 444185.013389224 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2031-Mar-02 07:55 < 00:01 Earth 0.115058960141605 0.115057826970616 0.115060093312621 9.76979990450042 9.76742930091926 2462927.830053986 0.140832203332747 56.5749382985803 1.24769619496795 3.0176943973034 644572.199741208 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2033-Apr-05 18:05 < 00:01 Mars 0.0547569732390585 0.0547561261630489 0.0547578203205245 11.3193016182487 11.3188397097195 2463693.253591708 0.0449555107993334 50.2933353015904 2.41420772634159 32.915880989193 1830899.02353147 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2040-Mar-24 17:31 < 00:01 Earth 0.482367444768 0.482365962448955 0.482368927087045 20.8315336812571 20.8312685164484 2466238.229515112 0.103997731909909 73.9299817824075 1.32743131428308 1.11510175108226 1247404.97244983 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2047-Jan-26 18:13 < 00:01 Mars 0.0600676329687181 0.0600673755596592 0.0600678904139976 10.8927394860361 10.8923019263781 2468737.258871955 0.0652386173571323 76.1267597791653 2.53839501248657 -80.4807389257888 3477697.19683689 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2050-Nov-25 02:31 < 00:01 Earth 0.154899185106966 0.154897261764398 0.154901108450836 10.9411975684901 10.9396252896519 2470135.605105080 0.219971127524636 98.4978088621713 1.61164197116135 -13.1979252306199 2702751.09628184 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2051-Mar-24 18:30 < 00:01 Earth 0.380230372719484 0.380228723437184 0.38023202200146 2.38772986675902 2.38479324841992 2470255.271172162 0.896688058417228 80.3294671774525 2.67716394069412 1.72017519548483 83954.2997600853 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2060-Feb-14 06:55 < 00:01 Earth 0.00800815888559194 0.00800690535272582 0.00800941249819875 6.33066741326676 6.27789046736959 2473503.788287072 0.642711859506468 74.2242069089261 1.00243414236606 32.6975815764398 623041.985121968 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2060-Feb-14 11:43 < 00:01 Moon 0.00667859504325219 0.00667747994687755 0.00667971035284001 5.45572068629127 5.45482115280105 2473503.988011037 0.6699623834959 81.4564121193196 1.00656107638569 46.9511283275717 718312.537094997 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2071-Feb-04 18:39 00:33 Earth 0.0149306166107489 0.0148949185882915 0.0149663262538934 5.682720037949 5.65122926337784 2477512.276896147 32.8112621591987 1898.34753505056 0.940124065646337 -20.1767060690576 855100.834898978 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2081-Nov-25 04:20 01:29 Earth 0.161115981622331 0.160338430827769 0.161893607703959 11.1648075123494 11.163326184094 2481458.680692403 88.8227521557722 39162.2516959463 2.19815267483766 -8.11070361576349 1264716.03511818 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2082-Mar-25 15:59 05:09 Earth 0.384820108773755 0.384177772792034 0.385462415367186 2.54435294881011 2.54163018682372 2481579.165838222 308.972496727743 31592.114988773 2.28213655119244 5.40482596862741 244812.086368442 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2089-Sep-05 21:09 00:40 Mars 0.0390203417120202 0.0386360027848361 0.0394208091253128 10.4872151696877 10.4865155380721 2484300.381003690 40.4369103636495 44137.0435577898 3.4651521567234 -63.6766866633236 1517909.41676325 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2091-Mar-22 11:59 01:42 Earth 0.418287987180375 0.417004334029714 0.419571643365827 18.9630319944915 18.9626960766792 2484862.999481809 101.528572456443 64035.320442786 1.22071550813121 1.63710413533224 1248240.41525222 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2102-Feb-27 04:32 05:17 Earth 0.0726913058662415 0.0709043491354348 0.0744785875253317 8.4206383728053 8.41628428518244 2488856.688885678 317.092482524541 89445.4890280267 1.13614892045073 5.10382575656325 715349.810204091 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2112-Dec-23 04:34 05:46 Earth 0.0178894315539318 0.0177095629206199 0.0180808202791901 5.78660680119744 5.76081029093818 2492808.689997212 346.352152212614 24505.6938253833 1.6178471569208 67.7564186486503 1588502.64928196 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2123-Nov-27 13:51 16:04 Earth 0.153877822501873 0.145340237207423 0.162426179323923 10.9155345330657 10.9139480958928 2496800.076985343 963.989964477545 430814.512097064 2.11846420171992 -8.60620274636837 1331861.44507477 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2124-Mar-23 04:11 3_08:42 Earth 0.378509143289217 0.371173933709372 0.385830785626694 2.00652385254796 2.00301252114986 2496916.674229126 4842.19268223034 347962.944360405 2.21703425910525 4.72712068137796 115449.772533158 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2134-Nov-13 09:35 17:02 Earth 0.377729415358581 0.364814787331227 0.390644783396563 17.7584036818304 17.7580064605715 2500803.899148338 1022.4417432662 644558.154605978 2.25489380939571 -2.38256404934731 879984.741225122 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2143-Oct-18 02:31 1_12:03 Earth 0.486824978207362 0.477057403055042 0.496605551263732 5.62040298617632 5.61942909669276 2504064.604925151 2162.54907696212 503279.15275777 2.56110616895838 14.5732856212117 2892975.88117904 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2144-Mar-16 14:40 22:07 Earth 0.303193991671594 0.28755174408149 0.318837596996397 15.5285599192162 15.5279939816825 2504215.110840099 1326.6300027508 780705.377448087 1.18483857471071 2.40438011217625 1334778.15653978 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2153-Aug-18 16:00 08:49 Mars 0.0513238528669161 0.0428934423487586 0.0613838269325108 10.1947865169373 10.194239349235 2507657.166422907 528.528373754679 649746.882355824 3.32471456472333 -43.8785822383632 1619345.56136969 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2155-Mar-01 07:07 1_19:13 Earth 0.0865650374715795 0.0701976784867538 0.102960207578492 8.8374414843787 8.83395787950684 2508216.796747138 2593.13431504892 820525.127781403 1.12945182516867 5.46595979996074 907460.534551859 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2166-Feb-03 08:18 22:57 Earth 0.0187519864166118 0.0175003850365837 0.0200193612364029 5.58551106379653 5.56001374289783 2512208.845614021 1377.28315933738 68436.9081078313 0.985227244165208 -23.2461369524421 1189433.48865222 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2171-Mar-21 08:33 00:52 Mars 0.0702669462037845 0.0692977715592008 0.0712654175976259 10.0126404467 10.0122335208199 2514080.856000156 52.4234303761409 86755.2879409598 2.48966982870953 55.5547691679093 3534834.86251689 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2176-Nov-25 20:09 02:09 Earth 0.168997018100326 0.167695219400789 0.170298938181313 11.4039115944176 11.4025289649736 2516157.339593914 128.859320964673 65310.1928310952 2.19527458167734 -6.3364624024083 1037830.98820734 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2177-Mar-28 18:05 07:04 Earth 0.390984293083357 0.389944604997041 0.392023964613802 2.85322394498824 2.85083448877996 2516280.253132503 423.78585980465 51691.3524522425 2.29569443810408 6.96942721983047 434544.525449631 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2186-Mar-23 01:30 00:22 Earth 0.407208933314288 0.407017157804944 0.407400708993578 18.6298948516505 18.6295436239584 2519561.562576871 22.1407507411921 9572.0669577746 1.24819063403247 2.51606627018706 1824331.25659609 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
2197-Feb-26 13:02 05:51 Earth 0.0664371003310621 0.0646088989838514 0.0682659740445921 8.20797109664569 8.20308350186019 2523555.042883829 350.605387526784 91789.1997153138 1.12060574038077 6.74719019801802 882988.05033567 T 125 CATAB v2.0f-lin.ifort 2020-Apr-06 05:50:37 2020-Apr-06 05:50
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-09 15:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin