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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 455 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226338074573542 1.1283e-08  
a 1.457960681644369 3.8107e-10 AU
q 1.133369343966764 1.6591e-08 AU
i 10.82899937350451 2.2522e-06 deg
node 304.3345369216904 8.7923e-06 deg
peri 178.7956776121438 9.9181e-06 deg
M 231.4013670751829 4.1731e-06 deg
tp 2457230.194711459310
(2015-Jul-26.69471146)
7.4637e-06 JED
period 643.0091381585272
1.76
2.521e-07
6.902e-10
d
yr
n .5598676265021381 2.195e-10 deg/d
Q 1.782552019321975 4.6591e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5158  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      18787 days (51.44 yr)  
   first obs. used      1963-07-15  
   last obs. used      2014-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43712  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:45:19  

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 0.314929526693361 0.314929013705644 0.314930039681447 5.57861534970782 5.57709853823609 2415380.562246273 0.085711370814764 21.5041586570791 2.39746131622648 -31.1385115154118 4623424.88448096 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1907-Nov-05 03:31 < 00:01 Earth 0.471485743237792 0.471485606423223 0.47148588005187 4.3944943285251 4.39320815832754 2417884.646197384 0.296105801217219 3.94398042671648 2.7433249413485 -4.53124953168185 6581323.56771706 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1917-Apr-20 21:19 < 00:01 Earth 0.499257047696656 0.499256945594396 0.499257149799362 4.81677926886452 4.81567116271421 2421339.388376157 0.215997965154254 4.3208382728076 3.20879439343576 13.9314660511295 7016934.10012483 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1924-Mar-05 22:13 < 00:01 Earth 0.359786223279252 0.359785858592266 0.359786587966402 4.59606489261248 4.59445329051404 2423850.425531804 0.139467504307398 14.3754027811635 2.62342459372642 27.330850502214 3806842.3557927 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1931-Jan-30 04:07 < 00:01 Earth 0.174073012501651 0.174072743271563 0.174073281732753 5.92081953646026 5.91823374240821 2426371.671222433 0.0332243967683644 13.1481566752499 1.85176501325202 53.4491085785751 5326567.63292403 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1938-Jan-13 22:04 < 00:01 Earth 0.215005486008612 0.215005172883718 0.215005799134028 6.08405459971126 6.08201735860658 2428912.419539526 0.0317773387589519 13.9060278656567 2.15985754201831 -42.3459896842107 4873806.24110678 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1944-Nov-27 01:41 < 00:01 Earth 0.403009231519496 0.403008993841901 0.403009469196185 3.62609875977924 3.62427500281788 2431421.569912331 0.232125733166467 7.1182191641989 2.18599796150468 -31.8978310188926 5026121.69617588 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1961-Apr-04 09:08 < 00:01 Earth 0.442492039164402 0.442491934338299 0.442492143990541 3.70783547646249 3.70621111910642 2437393.880355223 0.164823835932739 4.71427131115192 2.25043262251942 8.3720768603831 4588328.2033345 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1968-Feb-11 13:46 < 00:01 Earth 0.266271302806985 0.266271108693853 0.266271496920509 6.06688683412912 6.06523722463826 2439898.073412917 0.0274305517009705 8.14555473615068 2.07476761655302 26.726551430194 4624382.21147736 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1975-Jan-23 07:39 < 00:01 Earth 0.151134257384226 0.151134236629407 0.151134278139017 5.82530962111942 5.82228240598798 2442435.819050589 0.0182420690235727 5.09630942662209 1.89748430998632 -86.2790181366641 5507362.41637853 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1981-Dec-29 08:05 < 00:01 Earth 0.308489384741611 0.308489255003348 0.308489514480005 5.6652732713492 5.6637484824648 2444967.836507117 0.0284193643591444 6.33308998306554 2.3917313044624 -28.6064749534811 5090664.97848396 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
1988-Nov-06 14:56 < 00:01 Earth 0.467640227064295 0.467640157960106 0.46764029616981 4.30590154885663 4.30457811224607 2447472.122256815 0.0816643490480213 3.78773408674933 2.67277568498773 -5.65822076495794 6688223.57611764 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2005-Mar-08 22:07 < 00:01 Earth 0.36556725828447 0.365567197922798 0.365567318646223 4.41229498097213 4.41064278391221 2453438.421512531 0.0430342245830735 5.12217030519449 1.88166229169293 4.98952683579792 4023539.86905434 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2012-Jan-31 11:01 < 00:01 Earth 0.178675897786845 0.17867582748476 0.178675968088699 5.94519771969751 5.94268888685918 2455957.958756509 0.0144560047343063 3.67642477202858 1.78317411094677 39.384859808771 5197457.83269168 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2019-Jan-15 06:01 < 00:01 Earth 0.208598635191807 0.2085985414259 0.208598728958284 6.04491906335135 6.04280564083864 2458498.750800540 0.0189185491232569 4.55830134354604 2.13407689259292 -37.7111460776401 4983571.49267437 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2025-Nov-30 02:18 < 00:01 Earth 0.397647393579491 0.3976472977842 0.397647489375926 3.72885340163939 3.72705600638916 2461009.595550688 0.0949717259398548 4.48709578766782 1.68539586045623 -15.798324236508 5065742.25138003 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2042-Apr-06 19:02 < 00:01 Earth 0.446141835187227 0.446141760531017 0.44614190984502 3.72522625704034 3.72362271542939 2466981.292721319 0.168235633599609 4.38923197944246 2.42299170591107 6.99851014718735 4900685.62706912 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2049-Feb-12 05:38 < 00:01 Earth 0.272555526867766 0.272555305748477 0.272555747987185 6.05906539470669 6.05745174390377 2469484.734553377 0.0271237352607907 9.9364702779379 2.28167816904398 31.8478467701088 4799874.37969352 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2056-Jan-24 11:03 < 00:01 Earth 0.149782199175932 0.149782151443026 0.149782246909021 5.82075962784703 5.81770269045095 2472021.960384769 0.0232882279765897 7.96594043548356 1.95803181665161 -80.9185970995701 5233280.6698864 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2062-Dec-31 08:25 < 00:01 Earth 0.302953313372686 0.302953013852334 0.30295361289362 5.73224832030636 5.73071381007634 2474554.850486813 0.0508441383220277 12.2941244236289 2.33319285147308 -28.6632602326439 4509192.4295256 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2069-Nov-08 21:29 < 00:01 Earth 0.464728080645861 0.464727975224286 0.464728186066259 4.24541430372433 4.24406359266593 2477059.395097549 0.208506441022922 3.84572407825434 2.64342762131562 -7.48098223970805 6495229.04520302 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2086-Mar-11 22:55 < 00:01 Earth 0.371310285651815 0.371309907633764 0.371310663670167 4.22586114341319 4.2241627142533 2483026.454757154 0.185483085042077 14.5932256474631 2.84873358827287 30.5983944227057 3704200.09328729 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2093-Jan-31 15:47 < 00:01 Earth 0.182464147142158 0.182463813465404 0.182464480820096 5.97491617656556 5.97247166639421 2485544.157525119 0.0368144491654706 16.6688160818947 1.94503114809586 52.1873640346363 5257732.70255966 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2100-Jan-16 11:39 < 00:01 Earth 0.203878867526765 0.203878422607135 0.203879312447904 6.01492058840143 6.01274744339158 2488084.985233926 0.0465513026043581 18.6721435965391 2.10754345379841 -43.1507867468134 4732605.39787338 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2106-Dec-04 02:22 < 00:01 Earth 0.392290988266759 0.392290568689405 0.392291407845357 3.85303611114635 3.85127291622451 2490597.598770196 0.31051342565167 12.6195300972295 2.09191738413634 -32.4656605757127 5082650.40481255 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2123-Apr-10 05:51 < 00:01 Earth 0.449703083818908 0.449702875368468 0.449703292265781 3.75372793182339 3.75214917573947 2496568.744043150 0.454739883839929 4.90258559352576 2.87508248459284 21.462261310107 4906759.45887548 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2130-Feb-14 22:11 < 00:01 Earth 0.278164965913297 0.278164346542687 0.278165585284484 6.03818411111219 6.03659753600716 2499071.424502571 0.0685563383745657 26.0189078175551 2.30544571770694 32.3953895428705 4649344.79507089 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2137-Jan-25 14:12 < 00:01 Earth 0.149462326528635 0.149462260991009 0.149462392070799 5.81427778511367 5.81121088665738 2501608.091591359 0.0473331887334763 19.4923757718977 1.93938332623653 -84.9386163109969 5309897.39036797 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2144-Jan-03 10:26 < 00:01 Earth 0.296579963727318 0.296579266437489 0.296580661018157 5.79436084755417 5.79281016418904 2504141.934975581 0.101339535874678 28.0261043934892 2.3525704205362 -30.8814842889342 4507005.35523829 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2150-Nov-12 07:12 < 00:01 Earth 0.46094447584757 0.460944171827326 0.460944779870506 4.17449808002402 4.17311313822221 2506646.799878478 0.465814658738729 4.67904041200468 2.75951459086829 -22.2176806118093 5820394.30811919 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2167-Mar-16 05:30 < 00:01 Earth 0.37743421019639 0.377433470414123 0.377434949978344 4.02624523932062 4.02449149827904 2512614.729440733 0.409568366497934 25.81232702341 2.8771728960599 31.9932594884955 3586984.63347357 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2174-Feb-03 01:31 < 00:01 Earth 0.188400744076382 0.188400060285362 0.188401427872003 6.00554653986669 6.00319115228965 2515130.562864863 0.0688747656716983 32.1536934417878 1.94349188159783 49.4787500576963 5234101.66709133 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2181-Jan-17 20:55 < 00:01 Earth 0.198010361004897 0.198009574959406 0.198011147053842 5.98983920285684 5.98759226665143 2517671.371299442 0.0797219991137364 33.5847527226544 2.086035413202 -45.6285490289305 4812074.22734583 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45
2187-Dec-06 23:28 < 00:01 Earth 0.387313240362358 0.387312459304707 0.387314021419957 3.98339210267493 3.98166470977217 2520185.477989607 0.503022569895597 23.9076835008537 2.12622834195822 -33.8450676791946 5150773.66358583 T 455 CATAB v2.0c-linF95 2015-Jan-07 23:45:33 2015-Jan-07 23:45

Alternate Designations
 1898 DQ = 1956 PC 
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