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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 449 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .222633807499412 1.1284e-08  
a 1.457960681627074 3.8109e-10 AU
q 1.133369343892001 1.6592e-08 AU
i 10.82899937143476 2.2523e-06 deg
node 304.3345368652922 8.7947e-06 deg
peri 178.7956777458477 9.9223e-06 deg
M 231.4013670552788 4.1753e-06 deg
tp 2457230.194711490774
(2015-Jul-26.69471149)
7.4675e-06 JED
period 643.0091381470859
1.76
2.5211e-07
6.902e-10
d
yr
n .5598676265121001 2.1951e-10 deg/d
Q 1.782552019362148 4.6594e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5137  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      18725 days (51.27 yr)  
   first obs. used      1963-07-15  
   last obs. used      2014-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43727  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-22 06:16:35  

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 0.314929538591312 0.314929025574053 0.314930051608938 5.57861511219535 5.57709830071633 2415380.562242945 0.0857147687396812 21.5052071330542 2.39764400970035 -31.1381234347052 4623027.26636964 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1907-Nov-05 03:31 < 00:01 Earth 0.471485749178762 0.471485612310809 0.471485886046684 4.39449459477079 4.39320842466738 2417884.646194496 0.296108933829062 3.94690677896344 2.74374333052132 -4.5014187570983 6576208.62930785 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1917-Apr-20 21:19 < 00:01 Earth 0.499257043297138 0.499256941160571 0.49925714543415 4.81677915840713 4.81567105222163 2421339.388374961 0.21599800449562 4.32337453272288 3.20958409021162 13.8724137492306 7011746.31499879 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1924-Mar-05 22:13 < 00:01 Earth 0.359786216627706 0.359785851917394 0.359786581337711 4.5960651506111 4.59445354857336 2423850.425528686 0.139474015621742 14.3758160990402 2.62371844692628 27.329743926461 3806328.95899444 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1931-Jan-30 04:07 < 00:01 Earth 0.174073008039937 0.17407273878501 0.174073277295879 5.92081950339405 5.91823370926126 2426371.671222225 0.0332271440994431 13.1489475980628 1.85208184738899 53.4487445775158 5325638.30611219 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1938-Jan-13 22:04 < 00:01 Earth 0.215005490629917 0.215005177483453 0.215005803776433 6.08405463929919 6.08201739825156 2428912.419539349 0.0317783558449798 13.9069202259089 2.15991190382022 -42.3460950677996 4873687.66616905 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1944-Nov-27 01:41 < 00:01 Earth 0.403009234559976 0.403008996878464 0.403009472242181 3.62609873298074 3.62427497601967 2431421.569910775 0.232132099929438 7.11931923667375 2.1870067508873 -31.8874960316049 5023044.76456672 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1961-Apr-04 09:08 < 00:01 Earth 0.442492038136343 0.442491933299289 0.442492142973434 3.70783540168392 3.70621104429131 2437393.880353836 0.164824560636781 4.71588332863977 2.25126246379168 8.34900282792491 4585909.61124382 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1968-Feb-11 13:46 < 00:01 Earth 0.266271301720721 0.266271107587717 0.266271495854116 6.0668868510951 6.06523724160212 2439898.073412627 0.0274343378386371 8.14585233188602 2.07521075805197 26.7253674954636 4623420.36326189 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1975-Jan-23 07:39 < 00:01 Earth 0.151134257533005 0.151134236778827 0.151134278287183 5.82530962800628 5.8222824128814 2442435.819051013 0.018245024171332 5.09676033792532 1.89763507023822 -86.2791733084974 5506925.69313436 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1981-Dec-29 08:05 < 00:01 Earth 0.308489385695669 0.308489255951822 0.308489515438974 5.66527323467828 5.66374844578872 2444967.836506703 0.0284198598010271 6.33353947435567 2.39185599316088 -28.6043381823148 5090166.72451239 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
1988-Nov-06 14:56 < 00:01 Earth 0.467640227539323 0.467640158412121 0.467640296665753 4.30590156049691 4.30457812389126 2447472.122256759 0.081670770573391 3.79042135131406 2.67319453780482 -5.62544468573749 6683179.06210787 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2005-Mar-08 22:07 < 00:01 Earth 0.365567258192597 0.365567197829608 0.365567318555531 4.41229518207955 4.41064298509455 2453438.421510515 0.0430365235559936 5.12221213675632 1.88240503358841 4.98960676260604 4023427.30289757 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2012-Jan-31 11:01 < 00:01 Earth 0.17867589797165 0.178675827661458 0.178675968281985 5.94519776054052 5.94268892772202 2455957.958755765 0.0144603263696531 3.67649621435253 1.78348147497538 39.3814026754635 5196551.41377427 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2019-Jan-15 06:01 < 00:01 Earth 0.208598634251806 0.208598540489971 0.208598728013606 6.04491909712485 6.04280567461442 2458498.750801202 0.0189203663396605 4.55837419317724 2.1341334600486 -37.7104881644872 4983411.18449433 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2025-Nov-30 02:18 < 00:01 Earth 0.397647392142436 0.397647296363979 0.397647487920977 3.72885346806496 3.72705607284026 2461009.595552380 0.0949808248410806 4.48801055565667 1.68617482851139 -15.7876459517513 5063200.67840683 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2042-Apr-06 19:02 < 00:01 Earth 0.446141837510113 0.446141762897853 0.446141912124893 3.72522622206517 3.72362268044751 2466981.292721117 0.16826717948544 4.3906023881675 2.42405581973368 6.9674445772584 4898419.99164275 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2049-Feb-12 05:38 < 00:01 Earth 0.272555530880346 0.272555309759427 0.27255575200117 6.05906536182702 6.0574517110391 2469484.734554215 0.0271260254113671 9.93684846458526 2.28215981760467 31.8486603950871 4799052.81661534 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2056-Jan-24 11:03 < 00:01 Earth 0.149782198583984 0.149782150847987 0.149782246320163 5.82075962459526 5.81770268718538 2472021.960385093 0.0232923392188562 7.96606969755556 1.95819253964699 -80.9179715352603 5232843.07306478 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2062-Dec-31 08:25 < 00:01 Earth 0.302953309477129 0.302953009958569 0.302953608994997 5.73224858540288 5.73071407522411 2474554.850489651 0.0508459606931685 12.2945416858015 2.33331984890996 -28.6632074615229 4508950.52109864 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2069-Nov-08 21:29 < 00:01 Earth 0.464728078069409 0.464727972725584 0.46472818341593 4.24541442764254 4.24406371661608 2477059.395096533 0.208531167138464 3.84787533385423 2.64395929268399 -7.4459214735583 6491118.44233263 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2086-Mar-11 22:55 < 00:01 Earth 0.371310290264335 0.371309912236138 0.371310668293749 4.22586082941714 4.2241624001521 2483026.454760843 0.185491761763978 14.5939397821953 2.84921875054745 30.6003947998641 3703803.11300034 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2093-Jan-31 15:47 < 00:01 Earth 0.182464151397398 0.182463817716541 0.182464485079683 5.9749161882922 5.97247167818267 2485544.157525765 0.0368175848866436 16.6692885111347 1.94538534080245 52.1875875668886 5256797.73022459 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2100-Jan-16 11:39 < 00:01 Earth 0.203878862016948 0.203878417087641 0.203879306947764 6.01492062130415 6.01274747624745 2488084.985235353 0.0465543838436643 18.6726564492074 2.10759899624854 -43.1506221967817 4732466.37645747 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2106-Dec-04 02:22 < 00:01 Earth 0.392290982993473 0.392290563422081 0.392291402563332 3.85303623999514 3.85127304510858 2490597.598773108 0.310530185981205 12.6199989970726 2.09311365164841 -32.4660711283803 5079970.64691099 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2123-Apr-10 05:51 < 00:01 Earth 0.449703088807609 0.449702880484919 0.449703297126728 3.7537280624306 3.75214930641915 2496568.744045670 0.454780952904927 4.90326802258239 2.87683930524024 21.4347239534102 4904142.0150768 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2130-Feb-14 22:11 < 00:01 Earth 0.278164973957297 0.278164354569677 0.278165593344828 6.03818421343202 6.03659763839976 2499071.424502609 0.0685590035448404 26.0200307659893 2.30590185519093 32.3957198028363 4648480.17941735 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2137-Jan-25 14:12 < 00:01 Earth 0.149462325734763 0.149462260191996 0.149462391282068 5.8142777853409 5.81121088686845 2501608.091592927 0.0473374245492223 19.4929810193711 1.93954933607344 -84.9383986004937 5309441.13014949 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2144-Jan-03 10:26 < 00:01 Earth 0.296579954575669 0.296579257268012 0.296580651883307 5.79436075740303 5.79281007396592 2504141.934975791 0.101343805240882 28.0271660266726 2.35268935014145 -30.8815580760596 4506787.89003093 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2150-Nov-12 07:12 < 00:01 Earth 0.460944470177779 0.460944166324383 0.460944774028523 4.17449785391277 4.17311291201889 2506646.799881827 0.465848614640562 4.6800029597807 2.760759437238 -22.191986570937 5817385.21605531 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2167-Mar-16 05:30 < 00:01 Earth 0.377434219337093 0.377433479530486 0.377434959145503 4.02624463612656 4.02449089486461 2512614.729448389 0.409587874761772 25.813519131169 2.87766384799223 31.994368511467 3586492.48122683 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2174-Feb-03 01:31 < 00:01 Earth 0.18840075266358 0.188400068854698 0.188401436477065 6.00554655687117 6.00319116940818 2515130.562866180 0.0688785635844189 32.1548485404116 1.94385582989185 49.4788755983627 5233133.79162794 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2181-Jan-17 20:55 < 00:01 Earth 0.198010351085788 0.198009565015186 0.198011137160554 5.98983913377292 5.987592197429 2517671.371300009 0.0797265205657298 33.5859091080553 2.08609384684353 -45.6284674371754 4811932.38063918 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17
2187-Dec-06 23:28 < 00:01 Earth 0.38731322976234 0.387312448690004 0.387314010836298 3.98339225980531 3.98166486692344 2520185.477993123 0.50304682204787 23.9085793905117 2.12733661867937 -33.8457083175576 5148217.14880362 T 449 CATAB v2.0c-linF95 2014-Oct-22 06:16:52 2014-Oct-22 06:17

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