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433 Eros (1898 DQ)
Classification: Amor [NEO]          SPK-ID: 2000433
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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 2-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.

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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 442 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226333870714886 1.129e-08  
a 1.45796504930896 3.7893e-10 AU
q 1.133373352149456 1.6599e-08 AU
i 10.82897570723645 2.2531e-06 deg
node 304.335252174989 8.8088e-06 deg
peri 178.7833338559107 9.9421e-06 deg
M 119.4458904191775 4.1797e-06 deg
tp 2456587.152377262311
(2013-Oct-21.65237726)
7.4573e-06 JED
period 643.012027588657
1.76
2.5068e-07
6.863e-10
d
yr
n .5598651106885618 2.1827e-10 deg/d
Q 1.782556746468464 4.6329e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5121  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      18644 days (51.04 yr)  
   first obs. used      1963-07-15  
   last obs. used      2014-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43604  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-01 06:16:19  

Additional Information
 Earth MOID = .148916 AU 
 T_jup = 4.583 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.16 mag n/a PDS3 (MPC 17258)  
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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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]
geometric albedo albedo 0.25   0.06 Veverka et al. (2000) Science v.289,pp.2088-2097 average
B-V BV .921 mag .021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=48; phase (min.=8.73, mean=34.88, max.=57.19) deg.
U-B UB .531 mag .027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 (1898 DQ)          Discovered 1898-Aug-13 by Witt, G. at Berlin (548)
Independent discovery earlier the same night by A. Charlois, Nice.
Reference: DISCOVERY.DBLast Updated: 2013-09-05

[ 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 0.314929531903072 0.314929018680687 0.31493004512632 5.57861532171316 5.57709851025891 2415380.562245633 0.0857430538169738 21.5117087391152 2.39849571603856 -31.138819566707 4621482.53609817 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1907-Nov-05 03:31 < 00:01 Earth 0.471485744884663 0.471485607678051 0.471485882090781 4.3944944187826 4.39320824861596 2417884.646195984 0.296150323897998 3.95743226022174 2.74574001986367 -4.35096626270591 6557460.68508008 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1917-Apr-20 21:19 < 00:01 Earth 0.49925704773697 0.499256945367741 0.499257150105518 4.81677934090971 4.81567123477606 2421339.388376351 0.216000447499668 4.3342231065703 3.21277534467528 13.6603187523492 6990563.8544963 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1924-Mar-05 22:13 < 00:01 Earth 0.359786222860636 0.35978585803911 0.359786587682326 4.59606508905465 4.59445348702324 2423850.425530534 0.139510137722159 14.3799266608359 2.62621896941324 27.3186486479202 3801761.25161074 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1931-Jan-30 04:07 < 00:01 Earth 0.174073013283615 0.174072743868294 0.174073282700388 5.9208195360371 5.91823374199648 2426371.671223265 0.0332390940590757 13.1542253979294 1.85267198163305 53.4437823122559 5323605.68634776 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1938-Jan-13 22:04 < 00:01 Earth 0.215005484559122 0.215005171277223 0.21500579784201 6.0840545985852 6.08201735746641 2428912.419539670 0.0317930368676152 13.9123258469884 2.16133066532265 -42.3496887738033 4870843.1950042 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1944-Nov-27 01:41 < 00:01 Earth 0.40300922973114 0.403008991922812 0.403009467539002 3.62609873704031 3.62427498005942 2431421.569913825 0.232188165983366 7.12284011857754 2.18928006959017 -31.8634640731174 5015901.58348242 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1961-Apr-04 09:08 < 00:01 Earth 0.442492041874798 0.442491936949303 0.442492146799095 3.70783545066425 3.70621109330683 2437393.880353419 0.164830801299121 4.72527417162395 2.25390428938511 8.26743619376528 4574167.53947518 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1968-Feb-11 13:46 < 00:01 Earth 0.266271305520607 0.266271111283516 0.266271499756989 6.06688681730902 6.06523720783039 2439898.073413840 0.0274448547498043 8.14861880022583 2.07599494835761 26.7164890962942 4620650.65357935 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1975-Jan-23 07:39 < 00:01 Earth 0.151134257487517 0.151134236732159 0.15113427824292 5.82530966487713 5.8222824497705 2442435.819052356 0.0182648076782222 5.09952201336514 1.89837279798905 -86.2945763098319 5504867.90137493 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1981-Dec-29 08:05 < 00:01 Earth 0.308489384379676 0.308489254546627 0.308489514212598 5.66527347289711 5.66374868406518 2444967.836509081 0.0284373591860577 6.33540559676001 2.39285502543645 -28.6082824924222 5088616.95863589 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
1988-Nov-06 14:56 < 00:01 Earth 0.467640226668214 0.467640157420668 0.467640295915788 4.30590165041045 4.30457821382999 2447472.122255357 0.0816762011400283 3.79958878976445 2.67527142594285 -5.46924962303291 6665502.32260236 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2005-Mar-08 22:07 < 00:01 Earth 0.365567258193603 0.36556719786727 0.365567318520241 4.41229510655542 4.41064290954213 2453438.421511972 0.0430446608364405 5.12601239691629 1.88626345837918 4.98388320613789 4019953.66207634 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2012-Jan-31 11:01 < 00:01 Earth 0.178675898058142 0.178675827711815 0.178675968404468 5.94519769656692 5.94268886372263 2455957.958757615 0.0144735141410424 3.67725722670373 1.78417473198698 39.3682420474452 5193952.79576905 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2019-Jan-15 06:01 < 00:01 Earth 0.208598635647759 0.208598541887157 0.208598729408557 6.04491911193794 6.04280568944683 2458498.750801057 0.018944441079727 4.55844477102196 2.13565033989017 -37.7077768813185 4980627.48173299 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2025-Nov-30 02:18 < 00:01 Earth 0.397647393901097 0.397647298152173 0.397647489650105 3.72885338774016 3.72705599248468 2461009.595551708 0.0949954155360012 4.48870948485934 1.68835368438261 -15.7705305982175 5058681.83933001 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2042-Apr-06 19:02 < 00:01 Earth 0.446141836447551 0.446141762020172 0.446141910873476 3.72522629407847 3.723622752488 2466981.292720841 0.16843992737034 4.3981117831654 2.4280043697166 6.85677380015679 4887585.13769867 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2049-Feb-12 05:38 < 00:01 Earth 0.272555529113967 0.272555308008163 0.27255575022026 6.05906528209928 6.05745163127966 2469484.734555153 0.0271292410300653 9.93943470559824 2.28354943820882 31.8566032101339 4797225.84728088 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2056-Jan-24 11:03 < 00:01 Earth 0.149782199250399 0.149782151472571 0.14978224702841 5.82075965196157 5.81770271457968 2472021.960385089 0.0233177099662144 7.96700301260695 1.95924424297815 -80.9133653179407 5229974.46377441 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2062-Dec-31 08:25 < 00:01 Earth 0.30295331063541 0.302953011091511 0.302953610178917 5.73224848870308 5.73071397850428 2474554.850488766 0.0508638137285344 12.2967255647092 2.33428600328804 -28.661805852497 4507025.39242625 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2069-Nov-08 21:29 < 00:01 Earth 0.464728078592493 0.464727973546067 0.464728183638938 4.24541433161274 4.24406362055724 2477059.395096902 0.208629324477829 3.85455708639332 2.64669879711738 -7.29083249110458 6477569.95516057 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2086-Mar-11 22:55 < 00:01 Earth 0.371310288528968 0.371309910480262 0.371310666577977 4.22586099459479 4.22416256538822 2483026.454759740 0.185548796542519 14.5991293286081 2.85345524225653 30.6077131614635 3699408.87512438 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2093-Jan-31 15:47 < 00:01 Earth 0.182464150319765 0.182463816620847 0.182464484020111 5.97491622631998 5.97247171621157 2485544.157525383 0.0368317495400149 16.6723509658396 1.94626436194181 52.190758166573 5254655.87604973 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2100-Jan-16 11:39 < 00:01 Earth 0.203878864311204 0.203878419302217 0.203879309321701 6.014920635604 6.01274749057693 2488084.985235046 0.0465788068219057 18.6760684912687 2.10896092113966 -43.1484393227041 4729254.50659774 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2106-Dec-04 02:22 < 00:01 Earth 0.392290985124479 0.392290565515193 0.39229140473501 3.85303619163279 3.85127299673368 2490597.598773081 0.310609828903595 12.6221779923288 2.09541602498547 -32.472065787249 5075448.92181725 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2123-Apr-10 05:51 < 00:01 Earth 0.449703087239091 0.449702879525988 0.449703294952832 3.75372808162744 3.75214932561855 2496568.744044617 0.455020329494185 4.90727141398059 2.88367970914269 21.324804923088 4892956.2005855 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2130-Feb-14 22:11 < 00:01 Earth 0.278164970208757 0.278164350723154 0.278165589694938 6.03818399395419 6.03659741884286 2499071.424504580 0.0685728692970407 26.0271167147663 2.30712913705169 32.3989056029226 4646426.76963276 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2137-Jan-25 14:12 < 00:01 Earth 0.149462326645802 0.149462261049675 0.149462392244847 5.81427780879312 5.81121091035173 2501608.091591200 0.0473634108448787 19.4970256803815 1.94049372973588 -84.9359352558489 5306837.28766351 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2144-Jan-03 10:26 < 00:01 Earth 0.2965799597579 0.296579262319473 0.296580657196308 5.79436079086177 5.79281010746071 2504141.934975618 0.101373782446612 28.0338094550796 2.35373534597461 -30.880942840262 4504724.45825052 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2150-Nov-12 07:12 < 00:01 Earth 0.460944473098008 0.460944169847879 0.460944776345471 4.1744978236173 4.17311288172213 2506646.799881230 0.466017142433629 4.68213192393927 2.7664773237114 -22.1077771697621 5807315.37270696 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2167-Mar-16 05:30 < 00:01 Earth 0.377434214690884 0.377433474748657 0.377434954634918 4.02624507828226 4.0244913371914 2512614.729443835 0.409714032213611 25.8214824434616 2.88208168443089 31.9993536647813 3581608.51479797 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2174-Feb-03 01:31 < 00:01 Earth 0.188400748944659 0.188400065025568 0.188401432868355 6.00554652612938 6.00319113860783 2515130.562866473 0.0688997343929767 32.1622714444082 1.94466809952463 49.4806785013609 5231090.32850723 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2181-Jan-17 20:55 < 00:01 Earth 0.198010356225195 0.198009569975698 0.19801114247866 5.98983918205558 5.98759224578812 2517671.371299745 0.0797580520311753 33.5935581912767 2.08741105632675 -45.627195888481 4808799.54657592 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16
2187-Dec-06 23:28 < 00:01 Earth 0.38731323575365 0.387312454534294 0.387314016973595 3.98339212434199 3.98166473142807 2520185.477991217 0.503181312937192 23.9141358207743 2.1290641483989 -33.8490942458802 5144533.61806848 T 442 CATAB v2.0c-linF95 2014-Aug-01 06:16:34 2014-Aug-01 06:16

Alternate Designations
 1898 DQ = 1956 PC 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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