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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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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.


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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453423.5 (2005-Feb-22.0) TDB
Reference: JPL 658 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2227729281440329 9.6566e-09  
q 1.133345007188457 1.4054e-08 au
tp 2453371.594500307263
(2005-Jan-01.09450031)
2.545e-06 TDB
node 304.3999408251687 3.8522e-06 deg
peri 178.674249354197 4.0876e-06 deg
i 10.82918421626726 1.1642e-06 deg
  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
 Jupiter MOID = 3.2865 au 
 T_jup = 4.582 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.324899967088822E-17 -1.357056961243692E-16 -1.117512586402795E-14 6.627279215684603E-15 -9.292398829694464E-15 2.087248125265158E-15
q -1.357056961243692E-16 1.975211218186798E-16 1.616773774487792E-14 -9.692041088123332E-15 1.35679891282287E-14 -3.052674025852226E-15
tp -1.117512586402795E-14 1.616773774487792E-14 6.476870555089975E-12 -4.36722126256584E-13 4.526618229624027E-12 2.70661511970483E-13
node 6.627279215684603E-15 -9.692041088123332E-15 -4.36722126256584E-13 1.48394142683891E-11 -1.408030599548003E-11 1.615313302367723E-12
peri -9.292398829694464E-15 1.35679891282287E-14 4.526618229624027E-12 -1.408030599548003E-11 1.67084238823162E-11 -1.139350715953505E-12
i 2.087248125265158E-15 -3.052674025852226E-15 2.70661511970483E-13 1.615313302367723E-12 -1.139350715953505E-12 1.355455291665097E-12

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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