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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 438 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .222633384296753 1.0574e-08  
a 1.457965049731591 2.3524e-10 AU
q 1.133373356523463 1.5475e-08 AU
i 10.82897925402693 2.5e-06 deg
node 304.335260379523 5.6724e-06 deg
peri 178.7833319775369 7.7176e-06 deg
M 119.445884428768 4.0435e-06 deg
tp 2456587.152387869282
(2013-Oct-21.65238787)
7.2219e-06 JED
period 643.0120278682489
1.76
1.5562e-07
4.261e-10
d
yr
n .5598651104451235 1.355e-10 deg/d
Q 1.782556742939719 2.8761e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5046  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      18530 days (50.73 yr)  
   first obs. used      1963-07-15  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49515  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:35:17  

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 0.314929399486171 0.314929076744551 0.31492972222761 5.57862115221688 5.5771043417105 2415380.562307233 0.0579942235450478 13.6888466116875 2.61827029732975 -29.7719008367169 4215303.83854596 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1907-Nov-05 03:31 < 00:01 Earth 0.471485697620467 0.471485612142455 0.471485783097785 4.39449249919885 4.39320632834126 2417884.646227928 0.190464413202238 4.2219089258205 3.01382701899395 -7.868755655545 6182714.06823485 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1917-Apr-20 21:19 < 00:01 Earth 0.499257144108243 0.499257079607238 0.499257208608936 4.81678079005851 4.81567268447224 2421339.388400209 0.149163875008533 4.66075164966531 3.34875220129605 18.764997529249 6658146.21410105 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1924-Mar-05 22:13 < 00:01 Earth 0.359786341092837 0.35978611411617 0.359786568070295 4.59606540258215 4.59445380119041 2423850.425555870 0.0927607289540341 9.82768620384439 2.72887283299886 24.7348680168143 3672228.13378622 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1931-Jan-30 04:07 < 00:01 Earth 0.174073079623324 0.174072915431374 0.17407324381547 5.92082166148385 5.91823586935756 2426371.671236854 0.0208645083949675 8.45377705655735 1.97316688026791 52.4299226941798 4983942.85189266 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1938-Jan-13 22:04 < 00:01 Earth 0.215005415191606 0.215005219536936 0.215005610846219 6.08405648709813 6.08201924595452 2428912.419561769 0.0230187095679177 8.91673719533624 2.28555953507509 -40.5770694621399 4576572.63254785 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1944-Nov-27 01:41 < 00:01 Earth 0.403009204533006 0.403009046067992 0.403009362998911 3.62609996142191 3.62427620494307 2431421.569948073 0.153828653643026 5.11164214523083 1.94714717087159 -27.9959126817844 5530237.46266121 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1961-Apr-04 09:08 < 00:01 Earth 0.442492098638326 0.442492022002294 0.442492175273413 3.7078359778224 3.70621162090445 2437393.880364399 0.124062312491688 4.50162667336669 2.44354914433194 7.77093012439588 4741821.44452786 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1968-Feb-11 13:46 < 00:01 Earth 0.266271338208315 0.266271223280568 0.266271453135549 6.06688916445166 6.06523955581395 2439898.073415989 0.0195504212739496 5.72796797469257 2.1322685079635 21.8026338843162 4529988.10949128 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1975-Jan-23 07:39 < 00:01 Earth 0.151134258977592 0.15113423969717 0.151134278258065 5.82531151211681 5.82228429800049 2442435.819061275 0.0130902441983098 3.29803226291845 2.07443093416152 -87.2419267429719 5043225.8693894 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1981-Dec-29 08:05 < 00:01 Earth 0.308489398977218 0.308489315575883 0.308489482378032 5.66527648421705 5.66375169626799 2444967.836530334 0.0255529561332293 4.73917613237196 2.3970882780693 -16.0567588251278 4877993.20135213 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
1988-Nov-06 14:56 < 00:01 Earth 0.467640266177255 0.467640206888359 0.467640325466811 4.30590173497899 4.30457829853635 2447472.122261712 0.0688659441515886 4.09417329880617 2.94461681061895 -7.86149465618639 6211036.57463088 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2005-Mar-08 22:07 < 00:01 Earth 0.365567240713244 0.365567191398674 0.365567290028095 4.41229904578311 4.41064685016641 2453438.421488323 0.0414724811615513 4.88706966613339 1.89166132408839 1.64501438564513 4128209.11296045 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2012-Jan-31 11:01 < 00:01 Earth 0.178675864461583 0.178675819876169 0.178675909046728 5.94519944266281 5.94269061008383 2455957.958757442 0.0100962045540426 2.82678296934529 1.43163997987823 16.87502210937 4962375.34105004 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2019-Jan-15 06:01 < 00:01 Earth 0.208598700615974 0.208598653628309 0.208598747603283 6.04492127725309 6.04280785617763 2458498.750805500 0.0154681071776627 3.27286142937456 2.10721859054182 -23.5279731993137 5030159.15288237 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2025-Nov-30 02:18 < 00:01 Earth 0.397647484165131 0.397647398651757 0.39764756967796 3.72885382859167 3.72705643395689 2461009.595545284 0.073895219272752 3.91676077777253 1.67314347795457 -16.4944949139546 5620618.57889841 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2042-Apr-06 19:01 < 00:01 Earth 0.446141799112122 0.446141740013158 0.446141858210115 3.72522535692466 3.72362181479639 2466981.292699505 0.118463538822485 4.38201395914476 2.50390456636717 6.06050249079931 4882883.88494663 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2049-Feb-12 05:38 < 00:01 Earth 0.272555419824822 0.272555295413841 0.272555544235918 6.05906841219283 6.05745476155991 2469484.734531954 0.0203787410535393 6.36541480989345 2.32844352592301 26.327055711222 4611398.61231223 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2056-Jan-24 11:03 < 00:01 Earth 0.149782221584895 0.1497821942491 0.149782248920747 5.82076158604331 5.81770465013364 2472021.960384429 0.0157979092595491 4.91552631058026 2.09400499597955 -82.1062991559349 4913402.21656669 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2062-Dec-31 08:25 < 00:01 Earth 0.302953469086311 0.302953288179446 0.302953649993797 5.73224957888067 5.73071506977647 2474554.850476683 0.0353716288890835 8.10851878034956 2.50881479950827 -26.0291633303184 4290799.07101402 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2069-Nov-08 21:29 < 00:01 Earth 0.464728207525361 0.464728135512033 0.464728279537638 4.24541607942785 4.24406536930341 2477059.395077844 0.140069864593511 4.04835718651727 2.90763947463324 -8.58543751756962 6176149.29383577 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2086-Mar-11 22:55 < 00:01 Earth 0.37131013677329 0.371309912744586 0.371310360802897 4.2258682354976 4.22416980850812 2483026.454686616 0.120255303716875 9.56296135343443 2.80913281079775 26.7570402485689 3651493.41044937 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2093-Jan-31 15:47 < 00:01 Earth 0.18246400097572 0.182463795330847 0.182464206621664 5.97491746643633 5.9724729548343 2485544.157511716 0.023988033223858 10.3686596335793 2.03966443089279 50.8230314334564 4962228.59781352 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2100-Jan-16 11:39 < 00:01 Earth 0.203879061582644 0.203878793951227 0.203879329214151 6.0149231419971 6.01274999997898 2488084.985222741 0.0303869288073746 11.7346852672654 2.22705089427986 -42.9076324106026 4517749.87194184 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2106-Dec-04 02:22 < 00:01 Earth 0.392291200503384 0.392290934756817 0.392291466250798 3.85303495546876 3.85127176097197 2490597.598722592 0.198391733378268 8.42805276972607 1.97561244040258 -31.3312656249905 5406124.61768055 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2123-Apr-10 05:51 < 00:01 Earth 0.449702959664642 0.449702849819758 0.449703069511162 3.75372551528299 3.75214675774633 2496568.743995304 0.287313294645643 4.58660843939679 2.75864450350219 12.0922459687298 4858939.015288 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2130-Feb-14 22:11 < 00:01 Earth 0.278164722188034 0.278164343101891 0.278165101274403 6.03818813838536 6.03660156294847 2499071.424455625 0.0449120618797775 16.2231128966808 2.44936755241538 31.5344137794796 4357192.76588996 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2137-Jan-25 14:12 < 00:01 Earth 0.149462352635858 0.14946231682624 0.149462388446513 5.81427971281397 5.81121281591089 2501608.091580635 0.0303107592181924 12.1402783464563 2.08697388251292 -85.3798066381755 4937890.17898687 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2144-Jan-03 10:26 < 00:01 Earth 0.296580249944213 0.296579818687034 0.296580681201607 5.79436049700701 5.79280981504473 2504141.934935344 0.0647533746418851 17.7521677393899 2.56309609486645 -30.5269305250861 4174018.06195134 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2150-Nov-12 07:12 < 00:01 Earth 0.460944686369952 0.460944530282279 0.460944842459283 4.17450096973192 4.17311602952176 2506646.799836318 0.297211647582441 4.28975536621979 2.94054020740147 -17.042749692394 5904680.29187948 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2167-Mar-16 05:30 < 00:01 Earth 0.377433951084938 0.377433498841126 0.377434403327638 4.02625502398686 4.02450128600489 2512614.729323417 0.258148762242013 16.339768626253 2.86281881318556 30.6867953621589 3564376.37961706 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2174-Feb-03 01:30 < 00:01 Earth 0.18840048552091 0.188400059342897 0.188400911700665 6.00554741746116 6.00319202699535 2515130.562838141 0.0439848146692667 20.048719624116 2.05019523480886 49.0342487636528 4941427.96497775 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2181-Jan-17 20:55 < 00:01 Earth 0.198010658147265 0.198010174521735 0.198011141774954 5.98984212651235 5.98759519477656 2517671.371276462 0.0504790340485156 21.0391793891495 2.21304658845406 -45.6698626282279 4554628.20023517 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35
2187-Dec-06 23:28 < 00:01 Earth 0.387313562403111 0.387313072797477 0.387314052008999 3.98338898670398 3.98166159388599 2520185.477903767 0.317078985301055 15.3177749365092 2.05966570581873 -33.5097487755818 5331678.44014455 T 438 CATAB v2.0c-linF95 2014-Apr-17 13:35:29 2014-Apr-17 13:35

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