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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 444 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226338073929268 1.1287e-08  
a 1.457960681651607 3.8114e-10 AU
q 1.133369344066323 1.6597e-08 AU
i 10.8289993905551 2.2524e-06 deg
node 304.3345376059151 8.8001e-06 deg
peri 178.7956768329857 9.9304e-06 deg
M 231.4013671529605 4.1791e-06 deg
tp 2457230.194711322099
(2015-Jul-26.69471132)
7.4743e-06 JED
period 643.0091381633155
1.76
2.5214e-07
6.903e-10
d
yr
n .559867626497969 2.1954e-10 deg/d
Q 1.782552019236891 4.6599e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5123  
   # 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      .43603  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:52:28  

Additional Information
 Earth MOID = .149152 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. 2014-Mar-01) 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 0.314929524825086 0.314929011737907 0.314930037912634 5.57861529585352 5.57709848435814 2415380.562246259 0.0857233078392627 21.5074343642116 2.39766647242189 -31.1382384164444 4622984.1924298 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1907-Nov-05 03:31 < 00:01 Earth 0.471485741706694 0.471485604721758 0.471485878691884 4.39449431683343 4.39320814662826 2417884.646197385 0.296120296357826 3.95154484042765 2.7442302788607 -4.43305025964439 6567923.49725275 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1917-Apr-20 21:19 < 00:01 Earth 0.499257049438179 0.499256947224989 0.49925715165201 4.81677942729511 4.81567132118511 2421339.388377440 0.215998177734793 4.32784887300698 3.21059902510267 13.7670294645715 7002666.70684319 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1924-Mar-05 22:13 < 00:01 Earth 0.359786225203643 0.359785860448878 0.359786589958863 4.59606502043697 4.59445341839199 2423850.425531229 0.139486055154145 14.376982034575 2.62436853847995 27.3266950343036 3805119.54959811 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1931-Jan-30 04:07 < 00:01 Earth 0.174073013886913 0.17407274457243 0.17407328320241 5.92081952653214 5.91823373249633 2426371.671223303 0.0332320449948979 13.1507772358731 1.85228947537283 53.4473266499058 5324945.19587487 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1938-Jan-13 22:04 < 00:01 Earth 0.215005484106188 0.215005170910476 0.215005797302421 6.08405467455938 6.08201743346174 2428912.419540954 0.0317823222691877 13.9088364189268 2.16006502679399 -42.3473457005518 4873443.59181223 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1944-Nov-27 01:41 < 00:01 Earth 0.403009229706328 0.403008991991516 0.403009467419518 3.62609868661798 3.6242749296116 2431421.569911422 0.23214908319592 7.12081677430563 2.18827171488278 -31.8745369906406 5019174.33740649 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1961-Apr-04 09:08 < 00:01 Earth 0.442492040236904 0.442491935375694 0.44249214509815 3.7078355139715 3.70621115663582 2437393.880355210 0.164825604887853 4.71924636252081 2.2523936589129 8.30793864037484 4581236.48696614 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1968-Feb-11 13:46 < 00:01 Earth 0.266271303290337 0.266271109113892 0.266271497466832 6.06688706180833 6.06523745238239 2439898.073410959 0.0274391758324623 8.146660998254 2.07557103115336 26.7231921562237 4622428.49021095 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1975-Jan-23 07:39 < 00:01 Earth 0.151134257518683 0.151134236762866 0.151134278274543 5.82530964739022 5.82228243227513 2442435.819052148 0.0182521878045965 5.09778329315036 1.89771568325608 -86.2832872948106 5506713.40406085 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1981-Dec-29 08:05 < 00:01 Earth 0.308489385313158 0.308489255541869 0.30848951508525 5.66527321566446 5.66374842676789 2444967.836506805 0.0284227621742347 6.33422297470042 2.39190657702993 -28.6060789600717 5090080.18746438 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
1988-Nov-06 14:56 < 00:01 Earth 0.467640227145398 0.467640157975848 0.467640296315166 4.30590165217576 4.30457821559718 2447472.122255511 0.0816752638064747 3.79454772938084 2.67372400279609 -5.55275972366821 6675200.95514165 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2005-Mar-08 22:07 < 00:01 Earth 0.365567258133929 0.365567197783155 0.365567318484923 4.41229531693309 4.41064311999834 2453438.421509698 0.0430368450592812 5.12272628794124 1.88389202326076 4.98884488506642 4022847.80926778 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2012-Jan-31 11:01 < 00:01 Earth 0.178675897851108 0.178675827519869 0.178675968182491 5.94519773467032 5.94268890183921 2455957.958756561 0.0144668857667753 3.67666358825007 1.78376180044991 39.3783207487731 5195692.02911468 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2019-Jan-15 06:01 < 00:01 Earth 0.208598635493456 0.208598541732474 0.208598729255008 6.04491904674411 6.04280562422864 2458498.750800369 0.0189269806161819 4.55840135065172 2.13435524261442 -37.7119303010474 4983117.1119088 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2025-Nov-30 02:18 < 00:01 Earth 0.397647394155345 0.397647298401045 0.397647489908666 3.72885333966964 3.72705594439212 2461009.595550212 0.0949866564046007 4.48863752992259 1.68723051433071 -15.7754256029399 5060420.64938157 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2042-Apr-06 19:02 < 00:01 Earth 0.446141835559355 0.446141761027435 0.446141910091342 3.72522620131933 3.72362265968573 2466981.292719713 0.168330439214426 4.39335696163966 2.4256251916991 6.9119182109638 4894089.18685599 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2049-Feb-12 05:38 < 00:01 Earth 0.27255552749776 0.272555306378361 0.272555748616704 6.05906533700182 6.05745168618725 2469484.734554315 0.0271279632484602 9.93758534920319 2.28265948846781 31.8519969063 4798460.83122014 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2056-Jan-24 11:03 < 00:01 Earth 0.149782199208319 0.149782151456713 0.149782246960109 5.82075963481339 5.81770269742163 2472021.960384840 0.0233015651072069 7.96634460922839 1.95837463653837 -80.9163766158949 5232335.14875739 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2062-Dec-31 08:25 < 00:01 Earth 0.302953313729707 0.30295301420705 0.302953613252946 5.73224846851932 5.73071395833079 2474554.850488328 0.0508502597606446 12.2952607083017 2.33335572225235 -28.6631904590786 4508858.15404261 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2069-Nov-08 21:29 < 00:01 Earth 0.464728080940376 0.464727975724645 0.464728186156867 4.24541441165189 4.24406370062869 2477059.395096040 0.20857023922813 3.85099999854576 2.64476559701078 -7.37304671125355 6484806.65039285 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2086-Mar-11 22:55 < 00:01 Earth 0.371310283987803 0.371309905949051 0.371310662026293 4.22586085626668 4.22416242698372 2483026.454760533 0.185510073703681 14.5954818717747 2.85044956079438 30.6041728933513 3702680.82450031 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2093-Jan-31 15:47 < 00:01 Earth 0.182464145681585 0.182463811993634 0.182464479370964 5.97491623499069 5.97247172482368 2485544.157524124 0.0368231976261923 16.6702478901577 1.94569080486149 52.1886881886226 5256053.26481503 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2100-Jan-16 11:39 < 00:01 Earth 0.203878869846912 0.203878424892623 0.203879314802711 6.01492061478375 6.01274746980817 2488084.985234030 0.0465620729692222 18.673745262977 2.10775742257258 -43.1500210823351 4732060.41711947 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2106-Dec-04 02:22 < 00:01 Earth 0.392290991024622 0.39229057145147 0.392291410597301 3.85303605144581 3.85127285650904 2490597.598769666 0.310558268925192 12.6207453598599 2.09445098738852 -32.4679298925494 5077150.27068967 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2123-Apr-10 05:51 < 00:01 Earth 0.449703081091177 0.449702873020858 0.449703289164743 3.75372791240636 3.75214915630469 2496568.744042044 0.454866209114487 4.90461767521057 2.87973391212655 21.3828091857024 4899397.77504899 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2130-Feb-14 22:11 < 00:01 Earth 0.278164959959699 0.278164340539362 0.278165579380612 6.03818409286923 6.03659751772543 2499071.424502313 0.0685638171567731 26.0223584901459 2.30632325939481 32.3968943049985 4647785.02519433 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2137-Jan-25 14:12 < 00:01 Earth 0.149462327059205 0.149462261496119 0.149462392626829 5.81427779403727 5.81121089559659 2501608.091590524 0.0473466590478579 19.4942903961383 1.93970543300254 -84.9375810077141 5309007.26632041 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2144-Jan-03 10:26 < 00:01 Earth 0.296579970710773 0.296579273362663 0.296580668059893 5.79436061289993 5.7928099295085 2504141.934972839 0.101353057133858 28.0293834482379 2.35273245601099 -30.8814936720833 4506691.92269055 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2150-Nov-12 07:12 < 00:01 Earth 0.460944480467633 0.460944176883959 0.460944784048649 4.17449810998289 4.17311316820491 2506646.799877340 0.465910428990463 4.68109514372519 2.76295990853454 -22.147781151817 5812654.40040852 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2167-Mar-16 05:30 < 00:01 Earth 0.377434202941671 0.377433463087178 0.377434942797314 4.02624543926263 4.02449169827447 2512614.729438374 0.409629829664773 25.8160914472546 2.87895858748117 31.9965686536743 3585129.83381617 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2174-Feb-03 01:31 < 00:01 Earth 0.188400737540664 0.188400053694792 0.188401421391139 6.00554656038585 6.00319117273513 2515130.562863668 0.0688861467634928 32.157284830747 1.94415043034653 49.4794802278277 5232388.37044978 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2181-Jan-17 20:55 < 00:01 Earth 0.198010368053672 0.19800958192462 0.198011154186692 5.98983920623515 5.98759227011101 2517671.371298362 0.0797369024727525 33.5884252422856 2.08624286598674 -45.628088259558 4811558.12610544 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52
2187-Dec-06 23:28 < 00:01 Earth 0.387313247870157 0.387312466755111 0.387314028985151 3.98339209040908 3.9816646975345 2520185.477989456 0.503093237202967 23.9104309825746 2.12843301961979 -33.8470163475171 5145775.14834986 T 444 CATAB v2.0c-linF95 2014-Aug-13 13:52:41 2014-Aug-13 13:52

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