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433 Eros (A898 PA)
Classification: Amor [NEO]          SPK-ID: 2000433
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 658 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2229512647434284 9.6497e-09  
a 1.458045729081037 2.1374e-10 au
q 1.132972589728666 1.4063e-08 au
i 10.83054121829922 1.1645e-06 deg
node 304.2993259000444 3.8525e-06 deg
peri 178.8822959227224 4.088e-06 deg
M 271.0717325705167 1.4389e-06 deg
tp 2459159.351922368362
(2020-Nov-05.85192237)
2.5792e-06 TDB
period 643.0654021001488
1.76
1.414e-07
3.871e-10
d
yr
n .5598186418120109 1.231e-10 deg/d
Q 1.783118868433408 2.6139e-10 au
  Orbit Determination Parameters
   # obs. used (total)      8767  
   # delay obs. used      4  
   # Doppler obs. used      2  
   data-arc span      46330 days (126.84 yr)  
   first obs. used      1893-10-29  
   last obs. used      2020-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .28397  
   source      ORB  
   producer      Giorgini  
   solution date      2020-Sep-06 18:22:27  

Additional Information
 Earth MOID = .148623 au 
 Jupiter MOID = 3.2865 au 
 T_jup = 4.582 
[ 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 10.4   n/a MPO492754  
magnitude slope G 0.46   n/a PDS3 (MPC 17258) Fit
diameter diameter 16.84 km 0.06 Yeomans et al. (2000) Science v.289,pp.2085-2088 sphere having the measured volume of 2503 +/- 25 km^3
extent extent 34.4x11.2x11.2 km n/a Veverka et al. (2000) Science v.289,pp.2088-2097  
GM GM 4.463e-04 km^3/s^2 0.001e-04 Yeomans et al. (2000) Science v.289,pp.2085-2088  
bulk density density 2.67 g/cm^3 0.03 Yeomans et al. (2000) Science v.289,pp.2085-2088 based on a volume of 2503 +/- 25 km^3. Porosity 10-30%.
rotation period rot_per 5.270 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Campa, M. (1938) Mem. Soc. Astron. Ital. 11, 285-301.]
[Beyer, M. (1953) Astron. Nachr. 281, 121-130.]
[Cailliate, C. (1956) Publ. Observ. Lyon 3, fasc. 28.]
[Cristescu, C. (1976) Icarus 28, 39-42.]
[Dunlap, J.L. (1976) Icarus 28, 69-78.]
[Millis, R.L.; Bowell, E.; Thompson, D.T. (1976) Icarus 28, 53-67.]
[Scaltriti, F.; Zappala, V. (1976) Icarus 28, 29-35.]
[Taylor, R.C. (1985) Icarus 61, 3, 490-496.]
[Hicks, M.; Buratti, B.J.; Rabinowitz, D.L.; Genevier, G. (1999) Icarus 141, 411-414.]
[Yeomans, D.K.; Antreasian, P.G.; Bariiot, J.-P.; Chesley, S.R.; et al. (2000) Science 289, 2085-2087.]
[Kaasalainen, M.; Torppa, J.; Muinonen, K. (2001) Icarus 153, 37-51.]
[Miller, J.K.; Konopliv, A.S.; Antreasian, P.G.; Bordi, J.J.; et al. (2002) Icarus 155, 3-17.]
[Wolters, S.D.; Green, S.F.; McBride, N.; Davies, J.K. (2008) Icarus 193, 535-552.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Koehn, B.W.; Bowell, E.L.G.; Skiff, B.A.; Sanborn, J.J.; et al. (2014) Minor Planet Bull. 41, 286-300.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 22-36.]
[Aznar Macias, A.; Predatu, M.; Vaduvescu, O.; Oey, J. (2018) arXiv:1801.09420. Romanian J. Phys. 62, 904 (2017).]
[Hasegawa, S.; Kuroda, D.; Kitazato, K.; Kasuga, T.; et al. (2018) Pub. Astron. Soc. Japan 70, A114.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 27-40.]
geometric albedo albedo 0.25   0.06 Veverka et al. (2000) Science v.289,pp.2088-2097 average
B-V BV 0.921   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=48; phase (min.=8.73, mean=34.88, max.=57.19) deg.
U-B UB 0.531   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=45; phase (min.=7.37, mean=34.55, max.=57.19) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

433 Eros (A898 PA)          Discovered 1898-Aug-13 by Witt, G. at Berlin
Independent discovery earlier the same night by A. Charlois, Nice.
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-Dec-27 01:30 < 00:01 Earth 0.314929109243598 0.314928770649129 0.314929447838084 5.57862036137798 5.57710354925841 2415380.562349830 0.135424499972149 17.360268950775 6.57550461958809 14.4055536761747 5755693.05848185 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1907-Nov-05 03:31 < 00:01 Earth 0.471485514358231 0.471485325584323 0.471485703132621 4.39449034015508 4.39320416816541 2417884.646256504 0.0774204750538004 27.3370746675055 3.51124637231467 71.2365965757346 8723116.58678452 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1917-Apr-20 21:19 < 00:01 Earth 0.49925722905735 0.499257057462409 0.499257400652291 4.81678458316768 4.81567647864278 2421339.388447603 0.0674117916006762 8.83423151735502 3.55891638521515 16.0239887619778 3125190.71634423 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1924-Mar-05 22:13 < 00:01 Earth 0.359786524795732 0.35978626105059 0.359786788541489 4.5960536046792 4.59444199997209 2423850.425661077 0.129913537960191 29.5338194452139 6.30122460047959 -66.3720805707601 7812549.7506531 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1931-Jan-30 04:07 < 00:01 Earth 0.174073164088667 0.174072995458928 0.174073332722859 5.92081851998368 5.91823272773978 2426371.671253121 0.0324865350686627 45.9153116650481 1.92918878342714 79.7235822387634 10298347.3241355 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1938-Jan-13 22:04 < 00:01 Earth 0.215005213533752 0.215004986486131 0.215005440581531 6.08405229549247 6.08201505103375 2428912.419574616 0.0445091598396473 14.9262086025058 3.68533581091806 -42.2604842939197 5931113.46075419 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1944-Nov-27 01:41 < 00:01 Earth 0.403009041304271 0.403008868867902 0.403009213743549 3.62609871625652 3.62427495841226 2431421.569966603 0.0890548763451339 60.7473739996003 3.76440225130684 82.6684430219883 8376873.25310103 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1961-Apr-04 09:08 < 00:01 Earth 0.442492140845203 0.442492013347152 0.442492268343254 3.70783654975265 3.70621219324034 2437393.880415106 0.0578242053376022 6.43121046268645 5.17821516742053 -15.4478812563931 4762219.79106402 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1968-Feb-11 13:46 < 00:01 Earth 0.266271422628038 0.266271277186977 0.26627156806922 6.06688484889726 6.06523523960888 2439898.073440912 0.0349851901400009 14.1226756621548 4.92986059468596 66.2993577017154 7736103.2884024 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1975-Jan-23 07:39 < 00:01 Earth 0.151134183386476 0.151134128302004 0.151134238471009 5.82530760111607 5.8222803834518 2442435.819063704 0.0170019414035572 9.69732718939723 2.35482210622249 -81.3478088302564 8330946.91814913 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1981-Dec-29 08:05 < 00:01 Earth 0.30848931641907 0.308489217747118 0.308489415091023 5.66527178297612 5.66374699335327 2444967.836517259 0.048575747512576 6.69026837169411 4.56436943721395 67.8656023792392 7258220.56886189 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
1988-Nov-06 14:56 < 00:01 Earth 0.4676402046904 0.467640149078182 0.467640260302618 4.30590191789382 4.30457848133339 2447472.122257274 0.0200530937507188 9.20493240883671 2.73015692503475 86.909089841505 12326611.9970138 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2005-Mar-08 22:07 < 00:01 Earth 0.365567230387813 0.365567167184262 0.365567293591385 4.41229243534752 4.41064023720793 2453438.421527291 0.0297023106197101 11.2809607972066 2.97924770058985 84.586329598662 11799525.5277203 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2012-Jan-31 11:01 < 00:01 Earth 0.178675813750514 0.178675792590141 0.178675834910886 5.94519572815633 5.942686893297 2455957.958756580 0.00998861221223459 9.69231565576845 1.05390749376252 89.668134981841 11147669.2532372 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2019-Jan-15 06:01 < 00:01 Earth 0.208598687615586 0.208598631178872 0.2085987440523 6.04491769180209 6.04280426934091 2458498.750797456 0.0220546634180646 3.67271249867122 2.18859537794653 53.1077143521199 9205575.85642361 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2025-Nov-30 02:18 < 00:01 Earth 0.397647483265833 0.397647435513751 0.397647531017915 3.72885069167641 3.72705329552477 2461009.595501571 0.027752621459289 21.7653330467508 2.37531719980229 89.6017480334162 10412415.3088667 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2042-Apr-06 19:02 < 00:01 Earth 0.446141715266392 0.446141630747713 0.44614179978507 3.72522463924126 3.7236210965025 2466981.292708599 0.0335428189405496 5.2198150234564 3.29038016748536 49.609171021997 7093586.65644437 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2049-Feb-12 05:38 < 00:01 Earth 0.27255531863256 0.272555204362666 0.272555432902501 6.05906465227428 6.05745100004057 2469484.734528125 0.0305896161246079 11.8148808683572 4.76670688409384 73.2151302562457 7493995.03634036 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2056-Jan-24 11:03 < 00:01 Earth 0.149782176326085 0.149782127556474 0.149782225095738 5.8207578007406 5.81770086191799 2472021.960373861 0.0185428754007189 11.8865672890622 2.28788876324752 -85.9359635931065 8721201.50885144 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2062-Dec-31 08:25 < 00:01 Earth 0.302953560962204 0.302953402061065 0.302953719863343 5.73224288886345 5.7307083784333 2474554.850426781 0.0631534850597835 7.92763885119482 6.10704393614199 1.24625926716676 7129505.21176547 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2069-Nov-08 21:29 < 00:01 Earth 0.46472824766012 0.464728132510425 0.464728362810053 4.24541832459964 4.24406761530641 2477059.395041137 0.0485131611959243 20.3933794370448 3.3592851300931 76.6391367427924 9561676.76351367 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2086-Mar-11 22:55 < 00:01 Earth 0.371309983137424 0.371309766557622 0.371310199717818 4.22586533309328 4.22416690423392 2483026.454676301 0.114937188366354 29.4936882169432 5.5711508743762 -71.3269130068518 7617670.15743091 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2093-Jan-31 15:47 < 00:01 Earth 0.182463840598402 0.182463647880772 0.182464033319994 5.97491340339766 5.97246888798358 2485544.157496116 0.0351794210178953 44.7639751866819 2.33111729866082 77.9637009493888 9155378.38476811 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2100-Jan-16 11:39 < 00:01 Earth 0.203879168623524 0.203878922211934 0.20387941503545 6.01491984107466 6.01274669900468 2488084.985199942 0.0476824213857361 18.3128321662267 3.58276641966134 -49.1225970129586 6276893.14013504 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2106-Dec-04 02:22 < 00:01 Earth 0.392291310114301 0.392291064365917 0.392291555867055 3.85302953405143 3.85126633756537 2490597.598636433 0.130668947716747 70.3200142912721 4.0638852474027 80.5077201525933 8301472.46648976 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2123-Apr-10 05:51 < 00:01 Earth 0.449702797075819 0.449702573122705 0.449703021028933 3.75372371508271 3.75214495621768 2496568.743977977 0.101016045847504 11.153093612513 4.43243787090723 -1.41208056928482 2274385.16894811 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2130-Feb-14 22:11 < 00:01 Earth 0.278164507607825 0.278164152532981 0.278164862682811 6.03818505335554 6.03659847588376 2499071.424432083 0.0901302165227588 20.9566462709372 8.52064779354337 35.8272784027881 4536941.56268008 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2137-Jan-25 14:12 < 00:01 Earth 0.1494623117816 0.149462258867526 0.149462364696633 5.81427590484333 5.81120900509204 2501608.091562923 0.0406918365717054 34.6774059735833 2.21086740860326 -87.6127149873908 8977125.37778038 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2144-Jan-03 10:26 < 00:01 Earth 0.296580463252726 0.29658006203911 0.296580864466359 5.79435304954423 5.79280236670378 2504141.934864707 0.127565782766666 20.2536502517385 5.82080577370741 -9.23364762107743 4703773.6911118 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2150-Nov-12 07:12 < 00:01 Earth 0.4609448047892 0.460944536811414 0.460945072768899 4.17450446205827 4.17311952336297 2506646.799773400 0.114779103946126 50.2494417839999 3.56293666891083 75.1312141806356 9006202.98128612 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2167-Mar-16 05:30 < 00:01 Earth 0.377433679102898 0.377433247716073 0.377434110492984 4.02625499100129 4.02450125174092 2512614.729270573 0.239039053130821 61.1327663550233 5.5111140550712 -69.984732842442 7488899.5597909 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2174-Feb-03 01:30 < 00:01 Earth 0.188400208100535 0.188399803189831 0.188400613025248 6.00554287419883 6.00318747848144 2515130.562809845 0.0697545961211818 84.1929845665125 2.62873559153566 76.2388469455608 8605331.68114013 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2181-Jan-17 20:55 < 00:01 Earth 0.198010880577503 0.198010428949046 0.198011332207457 5.98983892864498 5.98759199823364 2517671.371236529 0.08100940751796 35.5223057379573 3.51909069785536 -51.0043569689751 6242370.36761256 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32
2187-Dec-06 23:28 < 00:01 Earth 0.387313802140714 0.387313340327378 0.387314263965983 3.98338082137189 3.98165342608092 2520185.477773397 0.239616598766372 111.630027349413 4.36055282782888 78.2873271649502 8092452.15100738 T 658 CATAB v2.0f-lin.ifort 2020-Sep-06 18:32:50 2020-Sep-06 18:32

Alternate Designations
 A898 PA = 1956 PC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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