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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 446 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226338074164911 1.1287e-08  
a 1.457960681676768 3.8113e-10 AU
q 1.133369344051526 1.6596e-08 AU
i 10.82899939190389 2.2524e-06 deg
node 304.3345376420587 8.7992e-06 deg
peri 178.7956768133796 9.929e-06 deg
M 231.4013670842091 4.1784e-06 deg
tp 2457230.194711450844
(2015-Jul-26.69471145)
7.4732e-06 JED
period 643.0091381799604
1.76
2.5214e-07
6.903e-10
d
yr
n .5598676264834762 2.1954e-10 deg/d
Q 1.782552019302009 4.6598e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5128  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      18700 days (51.20 yr)  
   first obs. used      1963-07-15  
   last obs. used      2014-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43584  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-27 06:15:27  

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 0.314929538802313 0.31492902572799 0.314930051877006 5.57861499339482 5.57709818188451 2415380.562242164 0.0857217465818742 21.5070291583744 2.39766083747965 -31.1381998930335 4622992.65882211 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1907-Nov-05 03:31 < 00:01 Earth 0.471485748814859 0.471485611850869 0.471485885779103 4.39449470539594 4.39320853532393 2417884.646193199 0.296117979015304 3.95077506441495 2.74414686371818 -4.44466018081651 6569299.97558168 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1917-Apr-20 21:19 < 00:01 Earth 0.499257043840793 0.499256941641465 0.499257146040568 4.81677929161948 4.81567118546584 2421339.388375873 0.215998125203041 4.32709348795657 3.21042476477968 13.7845691470404 7004193.07971794 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1924-Mar-05 22:13 < 00:01 Earth 0.359786216894685 0.359785852147863 0.3597865816412 4.59606526372246 4.59445366172559 2423850.425528148 0.139483862832568 14.3767645062789 2.62424831608227 27.3272657976053 3805344.06698725 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1931-Jan-30 04:07 < 00:01 Earth 0.174073008964548 0.174072739660662 0.174073278269885 5.92081952979241 5.9182337356849 2426371.671222189 0.0332312346646345 13.150446253763 1.8522608428953 53.4476033479008 5325046.41689944 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1938-Jan-13 22:04 < 00:01 Earth 0.215005489570901 0.215005176383808 0.215005802758225 6.08405465040992 6.08201740935598 2428912.419539792 0.0317815854476697 13.9084914498622 2.16002852103256 -42.3471088265751 4873506.1766516 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1944-Nov-27 01:41 < 00:01 Earth 0.403009233599266 0.403008995890716 0.403009471306194 3.62609867681714 3.62427491982345 2431421.569910717 0.232145877381434 7.12057174119599 2.18808116817093 -31.8765214854572 5019763.0884476 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1961-Apr-04 09:08 < 00:01 Earth 0.442492038852674 0.442491933996239 0.442492143708674 3.7078354569201 3.70621109955432 2437393.880353947 0.164825408252431 4.71866016802488 2.2522087160223 8.31471120433185 4582034.075164 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1968-Feb-11 13:46 < 00:01 Earth 0.266271302292526 0.266271108123665 0.266271496461438 6.06688690246266 6.0652372929872 2439898.073412486 0.0274384119781657 8.14651042798852 2.07552016475039 26.7236061449528 4622585.38837699 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1975-Jan-23 07:39 < 00:01 Earth 0.151134257625381 0.151134236869881 0.151134278380951 5.82530964063793 5.82228242552147 2442435.819051529 0.0182509619455652 5.09760107670409 1.8977004999845 -86.282460013621 5506753.10140391 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1981-Dec-29 08:05 < 00:01 Earth 0.308489385358471 0.308489255591986 0.308489515123998 5.66527328013651 5.66374849125752 2444967.836507388 0.0284221448080359 6.33410473965353 2.39189300226159 -28.6056784180146 5090092.74585389 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
1988-Nov-06 14:56 < 00:01 Earth 0.467640227137327 0.467640157975163 0.467640296299213 4.305901736099 4.3045782995462 2447472.122254681 0.0816747017862865 3.793868519335 2.67363275125581 -5.56502336810672 6676516.35463432 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2005-Mar-08 22:07 < 00:01 Earth 0.365567257772432 0.365567197419363 0.365567318125637 4.41229516318792 4.41064296619394 2453438.421511214 0.0430367966077346 5.12260839008043 1.88363214706288 4.98899029463076 4022970.24490786 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2012-Jan-31 11:01 < 00:01 Earth 0.17867589713138 0.178675826803311 0.178675967458843 5.94519772989301 5.94268889704977 2455957.958756549 0.0144658686397292 3.6766313441254 1.78371967552193 39.378848875842 5195827.79149301 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2019-Jan-15 06:01 < 00:01 Earth 0.20859863708389 0.208598543322735 0.208598730845008 6.04491905919123 6.04280563669623 2458498.750800304 0.0189257297174482 4.5583987982257 2.13430647318344 -37.7116927572733 4983185.9298533 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2025-Nov-30 02:18 < 00:01 Earth 0.397647396112278 0.397647300353859 0.397647491869719 3.72885335140161 3.7270559561386 2461009.595550374 0.0949858590933437 4.48856289288054 1.68706532235865 -15.7771848420723 5060823.6095741 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2042-Apr-06 19:02 < 00:01 Earth 0.446141832316035 0.446141757769204 0.446141906860833 3.72522610432102 3.72362256263399 2466981.292717764 0.168319330089166 4.39288183740073 2.42536143014205 6.92108736477115 4894825.10089174 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2049-Feb-12 05:38 < 00:01 Earth 0.272555520963058 0.272555299843404 0.272555742082257 6.05906526421643 6.05745161334379 2469484.734554239 0.0271277011512126 9.93744716916163 2.28258035210859 31.8513882783942 4798546.63625779 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2056-Jan-24 11:03 < 00:01 Earth 0.14978220036315 0.14978215261426 0.149782248112223 5.82075964050611 5.81770270314091 2472021.960384370 0.0232999467229417 7.96629322298321 1.95833986134449 -80.9166618647162 5232431.92428152 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2062-Dec-31 08:25 < 00:01 Earth 0.302953322718563 0.302953023196936 0.302953622240284 5.73224833900477 5.7307138288271 2474554.850486190 0.0508494200124668 12.2951332782128 2.33334484333388 -28.6632018559888 4508883.40974891 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2069-Nov-08 21:29 < 00:01 Earth 0.464728087087376 0.464727981850127 0.464728192326584 4.24541446023495 4.24406374924508 2477059.395095018 0.208563639405767 3.85049345322845 2.6446264299291 -7.38527672967896 6485836.19518698 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2086-Mar-11 22:55 < 00:01 Earth 0.371310271412781 0.371309893375713 0.371310649450151 4.22586153906736 4.22416311000141 2483026.454752232 0.185506660013178 14.5951970453794 2.85022409006624 30.6035366328441 3702892.08897868 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2093-Jan-31 15:47 < 00:01 Earth 0.182464134102553 0.182463800416026 0.182464467790903 5.97491609216735 5.97247158178673 2485544.157524448 0.036822242497993 16.6700700593073 1.94564423176952 52.1884857123727 5256163.96946599 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2100-Jan-16 11:39 < 00:01 Earth 0.20387888491769 0.203878439967554 0.203879329868838 6.01492068617913 6.01274754139002 2488084.985232669 0.0465606485938115 18.673546831471 2.10772060141904 -43.1501304873603 4732152.40088583 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2106-Dec-04 02:22 < 00:01 Earth 0.392291006361781 0.392290586790849 0.392291425933958 3.85303585540551 3.85127266044794 2490597.598764461 0.310553405001323 12.6206125911861 2.09425404633404 -32.4675726834799 5077555.32510572 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2123-Apr-10 05:51 < 00:01 Earth 0.449703067636663 0.449702859520943 0.449703275753024 3.75372772765267 3.75214897142602 2496568.744038152 0.454851060433476 4.90438449024893 2.87924715209807 21.3914519459256 4900194.3660867 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2130-Feb-14 22:11 < 00:01 Earth 0.278164938074058 0.278164318659476 0.278165557488963 6.03818448249346 6.03659790732722 2499071.424496040 0.0685629460160554 26.0219347280327 2.30625789183872 32.3966797414602 4647888.84282433 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2137-Jan-25 14:12 < 00:01 Earth 0.149462329057568 0.149462263497678 0.149462394620994 5.81427780125276 5.8112109028569 2501608.091589988 0.0473450115798295 19.49405108668 1.939676211088 -84.9377205017213 5309088.45775941 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2144-Jan-03 10:26 < 00:01 Earth 0.296579995407405 0.296579298066877 0.296580692748943 5.79436029120255 5.79280960785415 2504141.934967136 0.101351369001909 28.0289825166948 2.35271941452697 -30.881510309698 4506719.97813272 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2150-Nov-12 07:12 < 00:01 Earth 0.460944496926391 0.46094419330024 0.460944800555239 4.17449829082276 4.17311334915426 2506646.799873766 0.465899597894336 4.6809272653676 2.76258710848878 -22.1549651298608 5813424.96892243 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2167-Mar-16 05:30 < 00:01 Earth 0.377434174781485 0.377433434934917 0.377434914628801 4.02624610274164 4.02449236191172 2512614.729428220 0.409621998874338 25.8156289284389 2.87872146417365 31.9961888162853 3585381.82478457 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2174-Feb-03 01:31 < 00:01 Earth 0.188400710496022 0.188400026656982 0.188401394339663 6.005546449194 6.00319106116148 2515130.562860544 0.0688847975216736 32.1568386229864 1.94410672328818 49.4793774081551 5232497.07739341 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2181-Jan-17 20:55 < 00:01 Earth 0.198010398862446 0.198009612744093 0.198011184984963 5.9898393714631 5.98759243575063 2517671.371295894 0.0797350042963269 33.5879719426035 2.08620814339843 -45.6281487457768 4811643.94053377 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15
2187-Dec-06 23:28 < 00:01 Earth 0.387313279636842 0.38731249853033 0.387314060744337 3.98339145848232 3.98166406547529 2520185.477976093 0.503085251476298 23.910084621174 2.12827776329712 -33.8467899847665 5146115.43987006 T 446 CATAB v2.0c-linF95 2014-Sep-27 06:15:40 2014-Sep-27 06:15

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