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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 441 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226333871958019 1.1296e-08  
a 1.457965049245366 3.7901e-10 AU
q 1.133373351918776 1.6607e-08 AU
i 10.82897570100868 2.2538e-06 deg
node 304.3352521536078 8.8167e-06 deg
peri 178.7833340166054 9.9527e-06 deg
M 119.4458903658659 4.1843e-06 deg
tp 2456587.152377371493
(2013-Oct-21.65237737)
7.4656e-06 JED
period 643.0120275465858
1.76
2.5073e-07
6.865e-10
d
yr
n .5598651107251928 2.1831e-10 deg/d
Q 1.782556746571955 4.6339e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5113  
   # 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      .43594  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:11:37  

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 0.314929528132927 0.314929014786058 0.314930041480658 5.57861540036035 5.57709858890932 2415380.562246788 0.0857608831244995 21.5156525428945 2.39917533527899 -31.1393537873832 4620256.76421428 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1907-Nov-05 03:31 < 00:01 Earth 0.471485742948585 0.471485605537885 0.471485880358791 4.39449434691854 4.39320817672557 2417884.646196970 0.296177850225606 3.96293579126003 2.74704047499524 -4.27376536038867 6547714.49539328 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1917-Apr-20 21:19 < 00:01 Earth 0.499257049297897 0.49925694678718 0.49925715180887 4.81677943185209 4.81567132574284 2421339.388377403 0.216002452369151 4.34012399563472 3.21471139340427 13.5578082321122 6979326.34927566 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1924-Mar-05 22:13 < 00:01 Earth 0.359786225197652 0.359785860312158 0.359786590082547 4.59606488927615 4.59445328718513 2423850.425532675 0.139532273872068 14.3825690652004 2.62784931235216 27.3114803780539 3798796.1600733 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1931-Jan-30 04:07 < 00:01 Earth 0.1740730142175 0.174072744707737 0.174073283728987 5.92081954416691 5.91823375014372 2426371.671223352 0.0332455918762834 13.1573986747548 1.85299918602296 53.4405786089578 5322447.8488753 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1938-Jan-13 22:04 < 00:01 Earth 0.215005483864056 0.215005170501671 0.215005797227432 6.08405462904046 6.08201738792528 2428912.419540266 0.0318025400294774 13.9155524677179 2.16240822530138 -42.3518540012907 4868644.17599577 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1944-Nov-27 01:41 < 00:01 Earth 0.403009230077765 0.403008992182524 0.403009467971383 3.62609871175234 3.62427495476029 2431421.569912643 0.232223856959837 7.12471926286741 2.19024171022699 -31.852905803706 5012790.3715709 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1961-Apr-04 09:08 < 00:01 Earth 0.442492040887724 0.442491935908203 0.442492145868042 3.70783554529209 3.70621118797252 2437393.880355590 0.164835259860163 4.73075568598487 2.25529572178346 8.22844565679144 4567676.19651791 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1968-Feb-11 13:46 < 00:01 Earth 0.266271304480247 0.266271110185946 0.2662714987746 6.0668869037184 6.06523729425683 2439898.073412890 0.0274501631057747 8.15037941859384 2.07637158830726 26.7105707593307 4619073.80750338 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1975-Jan-23 07:39 < 00:01 Earth 0.15113425743052 0.151134236675142 0.151134278185941 5.82530964899854 5.82228243388252 2442435.819051300 0.0182762487644064 5.10113163551802 1.89892183300556 -86.304743401758 5503330.58350309 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1981-Dec-29 08:05 < 00:01 Earth 0.308489384807748 0.308489254917906 0.308489514697047 5.66527327365882 5.66374848477537 2444967.836507350 0.028449990180598 6.33649453829946 2.39364413987211 -28.6106442826487 5087422.55435743 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
1988-Nov-06 14:56 < 00:01 Earth 0.467640227061549 0.467640157741497 0.46764029638132 4.30590164600823 4.30457820942753 2447472.122255527 0.0816772052659745 3.80430820115796 2.67661048648958 -5.39038608098197 6656450.70886366 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2005-Mar-08 22:07 < 00:01 Earth 0.365567257995798 0.365567197691973 0.365567318299979 4.41229534177698 4.41064314485091 2453438.421509635 0.0430510199247548 5.12884379490303 1.88846021809869 4.97983017490212 4017455.08226106 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2012-Jan-31 11:01 < 00:01 Earth 0.178675898049823 0.178675827688203 0.178675968411817 5.94519771141826 5.94268887858012 2455957.958757394 0.0144797421453055 3.67777502371435 1.78454412276826 39.3595882112984 5192425.19839883 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2019-Jan-15 06:01 < 00:01 Earth 0.208598633534521 0.208598539773526 0.208598727295105 6.04491918459495 6.04280576210785 2458498.750802518 0.0189600833955627 4.55847730004845 2.1367651115637 -37.704639970472 4978516.88101686 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2025-Nov-30 02:18 < 00:01 Earth 0.39764739058465 0.397647294842366 0.397647486325955 3.72885340922743 3.72705601396732 2461009.595552478 0.0950031112199933 4.4887879038415 1.68940303206569 -15.7653818200539 5056996.66698107 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2042-Apr-06 19:02 < 00:01 Earth 0.446141842435657 0.446141768107305 0.44614191676501 3.7252262102362 3.72362266863115 2466981.292720213 0.168540724338508 4.40243847723836 2.43019220002015 6.80370066184382 4881620.14622215 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2049-Feb-12 05:38 < 00:01 Earth 0.272555540895629 0.272555319800798 0.272555761990006 6.05906524301338 6.05745159225311 2469484.734557065 0.0271304450939654 9.94111411821756 2.28433995317541 31.861041952563 4796166.61539782 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2056-Jan-24 11:03 < 00:01 Earth 0.149782196817392 0.149782149014993 0.149782244619974 5.8207596352597 5.81770269781937 2472021.960385561 0.023332550576716 7.96760467024904 1.95998916823867 -80.9106037870691 5227951.26425893 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2062-Dec-31 08:25 < 00:01 Earth 0.302953290294289 0.302952990732053 0.302953589857106 5.7322487100682 5.73071419982563 2474554.850493091 0.0508759405362504 12.2980597883242 2.33505804249783 -28.6606743989472 4505502.87197106 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2069-Nov-08 21:29 < 00:01 Earth 0.464728063366453 0.46472795848057 0.464728168253839 4.2454139617744 4.24406325055693 2477059.395102410 0.208684074431655 3.85789697320189 2.64839839435795 -7.21280725840618 6470794.05742303 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2086-Mar-11 22:55 < 00:01 Earth 0.371310323140117 0.371309945082911 0.371310701198541 4.22586031362767 4.22416188430565 2483026.454770165 0.18558415245762 14.6024466969027 2.85613759418252 30.6112316923928 3696526.78163369 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2093-Jan-31 15:47 < 00:01 Earth 0.182464184132949 0.182463850423845 0.182464517843238 5.9749164101095 5.97247190052941 2485544.157528769 0.036839703051266 16.6742802571677 1.94676682967231 52.1926729979713 5253440.18304248 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2100-Jan-16 11:39 < 00:01 Earth 0.203878817576842 0.203878372517294 0.203879262637402 6.01492051600011 6.01274737043158 2488084.985240946 0.0465941016157431 18.6781921487156 2.10998770718056 -43.1470407816917 4726857.35653718 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2106-Dec-04 02:22 < 00:01 Earth 0.392290935926386 0.392290516282753 0.392291355571264 3.85303679843079 3.85127360358831 2490597.598789419 0.310657113066088 12.6234916213863 2.09634139102989 -32.47585386036 5073797.93610243 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2123-Apr-10 05:51 < 00:01 Earth 0.449703136178392 0.449702928797614 0.449703343562421 3.7537288019056 3.75215004637163 2496568.744059780 0.455162249042591 4.90965430294479 2.88735078247019 21.2697472043867 4887000.31619417 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2130-Feb-14 22:11 < 00:01 Earth 0.278165055756143 0.278164436210451 0.278165675302159 6.03818382977911 6.03659725511264 2499071.424516578 0.0685811929742613 26.0314920327884 2.30783676348977 32.4007779132279 4645248.65549357 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2137-Jan-25 14:12 < 00:01 Earth 0.149462318336343 0.14946225271016 0.149462383966066 5.81427779373164 5.81121089511176 2501608.091599288 0.0473788697605666 19.4995352871911 1.94116539601935 -84.9344698259804 5304988.93019218 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2144-Jan-03 10:26 < 00:01 Earth 0.296579853265748 0.29657915574499 0.296580550787002 5.79436181786508 5.79281113418206 2504141.934997061 0.101392655119005 28.037870160838 2.35456948483291 -30.8804782962199 4503086.38483573 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2150-Nov-12 07:12 < 00:01 Earth 0.460944401125483 0.460944098186418 0.460944704063928 4.17449682500328 4.17311188256042 2506646.799899630 0.466115711051132 4.68310414963834 2.76968628593394 -22.0688501410442 5802314.45813079 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2167-Mar-16 05:30 < 00:01 Earth 0.377434331613725 0.377433591590092 0.377435071638106 4.02624220450524 4.02448846270548 2512614.729487476 0.409792002895196 25.8264012854328 2.88487043805826 32.0020092872468 3578485.32286501 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2174-Feb-03 01:31 < 00:01 Earth 0.188400859798828 0.188400175811601 0.188401543791064 6.00554699556703 6.00319160961584 2515130.562879220 0.068912306118666 32.1668656518493 1.94512070280917 49.4817458037364 5229960.56244852 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2181-Jan-17 20:55 < 00:01 Earth 0.19801022949082 0.198009443131171 0.198011015854953 5.98983881367899 5.98759187583489 2517671.371315088 0.0797774708736109 33.5982593305091 2.08840628623316 -45.626430052692 4806448.15421768 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11
2187-Dec-06 23:28 < 00:01 Earth 0.387313103923777 0.387312322608602 0.387313885238901 3.98339426448362 3.9816668719101 2520185.478038797 0.503261507561346 23.9175762306864 2.12967656786464 -33.8510104983926 5143317.91875057 T 441 CATAB v2.0c-linF95 2014-Jun-16 13:11:50 2014-Jun-16 13:11

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