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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 445 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226338074012698 1.1287e-08  
a 1.457960681645452 3.8114e-10 AU
q 1.133369344049375 1.6597e-08 AU
i 10.8289993907707 2.2524e-06 deg
node 304.3345376060526 8.8001e-06 deg
peri 178.7956768419359 9.9304e-06 deg
M 231.4013671184009 4.1791e-06 deg
tp 2457230.194711382372
(2015-Jul-26.69471138)
7.4743e-06 JED
period 643.0091381592435
1.76
2.5214e-07
6.903e-10
d
yr
n .5598676265015143 2.1954e-10 deg/d
Q 1.782552019241529 4.6599e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5123  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      18644 days (51.04 yr)  
   first obs. used      1963-07-15  
   last obs. used      2014-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43603  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:35:15  

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 0.314929512634529 0.314928999547409 0.314930025722018 5.57861547492068 5.57709866341528 2415380.562249136 0.0857232874111492 21.5074319420059 2.39766647898201 -31.138238323075 4622984.12512238 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1907-Nov-05 03:31 < 00:01 Earth 0.471485735588834 0.471485598603432 0.471485872574029 4.39449424744509 4.39320807720292 2417884.646198563 0.296120268208491 3.95154480984656 2.74423021570054 -4.43305008469807 6567923.37265716 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1917-Apr-20 21:19 < 00:01 Earth 0.499257053986349 0.499256951772956 0.499257156200188 4.81677969761552 4.81567159157782 2421339.388380105 0.215998139611322 4.32784877550837 3.21059938433712 13.7670320134315 7002667.22327132 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1924-Mar-05 22:13 < 00:01 Earth 0.359786231276984 0.359785866522259 0.359786596032636 4.59606500837249 4.59445340635048 2423850.425531925 0.139486047765027 14.3769813003752 2.62436869213521 27.3266956377298 3805119.49555477 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1931-Jan-30 04:07 < 00:01 Earth 0.174073017261085 0.174072747946605 0.174073286577017 5.92081950721942 5.91823371322531 2426371.671224485 0.0332320447521869 13.1507765505248 1.8522895012123 53.4473250268494 5324945.10661201 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1938-Jan-13 22:04 < 00:01 Earth 0.215005480750201 0.215005167554507 0.215005793946416 6.0840545974528 6.08201735629752 2428912.419540468 0.0317823230496724 13.9088355159492 2.16006499362417 -42.3473465163573 4873443.62199753 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1944-Nov-27 01:41 < 00:01 Earth 0.403009227720527 0.403008990005737 0.403009465433695 3.62609873440427 3.62427497741295 2431421.569913438 0.232149063701161 7.12081739633183 2.18827180382806 -31.8745391746777 5019174.34644621 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1961-Apr-04 09:08 < 00:01 Earth 0.442492041536914 0.442491936675707 0.442492146398156 3.70783552625471 3.70621116892918 2437393.880355589 0.16482560283912 4.71924633251478 2.25239367876669 8.30793816861411 4581236.52022447 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1968-Feb-11 13:46 < 00:01 Earth 0.266271305010169 0.266271110833723 0.266271499187005 6.0668870414712 6.06523743205038 2439898.073411388 0.027439176491931 8.14666099310233 2.07557102425047 26.7231916717448 4622428.46313684 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1975-Jan-23 07:39 < 00:01 Earth 0.151134257301937 0.151134236546094 0.151134278057867 5.8253096432743 5.82228242815273 2442435.819052037 0.018252187764997 5.09778330087738 1.89771567417916 -86.2832884233353 5506713.42548984 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1981-Dec-29 08:05 < 00:01 Earth 0.308489384786792 0.308489255015243 0.308489514558886 5.66527342978219 5.66374864094066 2444967.836508749 0.028422759331269 6.33422316288184 2.3919066981481 -28.6060796597762 5090080.17457913 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
1988-Nov-06 14:56 < 00:01 Earth 0.467640227082558 0.467640157913313 0.467640296253127 4.30590162353207 4.30457818694451 2447472.122255815 0.0816752655767683 3.79454773917475 2.67372399125082 -5.55275938402516 6675200.89540253 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2005-Mar-08 22:07 < 00:01 Earth 0.365567257933034 0.365567197582262 0.365567318283804 4.41229521644651 4.41064301947321 2453438.421510672 0.0430368462283583 5.1227262629587 1.88389195128683 4.98884472280553 4022847.74856512 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2012-Jan-31 11:01 < 00:01 Earth 0.178675897339151 0.17867582700768 0.17867596767016 5.94519768075682 5.94268884789576 2455957.958757540 0.0144668860585349 3.67666356883755 1.78376178063571 39.3783205124958 5195692.01259259 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2019-Jan-15 06:01 < 00:01 Earth 0.208598635929543 0.208598542168187 0.208598729691096 6.04491910208275 6.04280567959105 2458498.750801089 0.0189269802823 4.55840139334837 2.13435528579592 -37.7119305662069 4983117.08835861 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2025-Nov-30 02:18 < 00:01 Earth 0.397647394467619 0.397647298713319 0.397647490221345 3.72885334058219 3.72705594530653 2461009.595550197 0.0949866560775679 4.48863752987348 1.68723052733945 -15.7754257429105 5060420.65400088 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2042-Apr-06 19:02 < 00:01 Earth 0.446141834866342 0.446141760331971 0.446141909399263 3.72522623401338 3.72362269239137 2466981.292720233 0.16833043189858 4.39335689384389 2.42562504124873 6.91191721403986 4894089.2814499 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2049-Feb-12 05:38 < 00:01 Earth 0.272555526020433 0.272555304901039 0.272555747139371 6.05906503784516 6.05745138694216 2469484.734557038 0.0271279678636597 9.93758473045818 2.28265941458303 31.8519968337107 4798460.78667543 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2056-Jan-24 11:03 < 00:01 Earth 0.149782199660875 0.149782151909265 0.149782247412668 5.82075962979393 5.81770269240878 2472021.960383905 0.0233015647073414 7.96634439935527 1.95837464018641 -80.9163757425617 5232335.13953988 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2062-Dec-31 08:25 < 00:01 Earth 0.302953317221272 0.302953017698626 0.302953616744499 5.73224853108767 5.73071402093358 2474554.850488517 0.0508502565660435 12.2952605046563 2.33335579430782 -28.6631904441445 4508858.12692031 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2069-Nov-08 21:29 < 00:01 Earth 0.464728083554242 0.464727978338524 0.464728188771178 4.24541439104761 4.24406368002545 2477059.395096076 0.208570236481236 3.8510000142944 2.64476564169771 -7.3730474175513 6484806.64120612 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2086-Mar-11 22:55 < 00:01 Earth 0.371310276948051 0.37130989890843 0.371310654986497 4.2258615940954 4.2241631650769 2483026.454752157 0.185509969131635 14.5954854882261 2.85044992614677 30.6041749862678 3702681.00003314 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2093-Jan-31 15:47 < 00:01 Earth 0.182464138780649 0.182463805092734 0.182464472469749 5.97491616461963 5.97247165433135 2485544.157524006 0.0368231977018271 16.6702467715867 1.94569079827807 52.1886913814107 5256053.26082309 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2100-Jan-16 11:39 < 00:01 Earth 0.203878879598983 0.20387843464469 0.203879324554787 6.01492070865919 6.01274756382151 2488084.985233894 0.0465620703092348 18.6737454136807 2.10775750826404 -43.1500183079654 4732060.27262405 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2106-Dec-04 02:22 < 00:01 Earth 0.392291001464979 0.392290581891836 0.392291421036588 3.85303585803348 3.8512726630551 2490597.598764908 0.31055831347314 12.6207424266801 2.09445095611061 -32.4679296887799 5077150.29848474 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2123-Apr-10 05:51 < 00:01 Earth 0.449703070704482 0.449702862634076 0.449703278775528 3.75372778909217 3.75214903290214 2496568.744039331 0.454866218201908 4.90461821427189 2.87973383239834 21.3828134512737 4899397.37403655 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2130-Feb-14 22:11 < 00:01 Earth 0.278164942530255 0.278164323109672 0.278165561951161 6.03818422027255 6.03659764506282 2499071.424498998 0.0685638071789719 26.0223582232762 2.30632318744033 32.3968957462866 4647785.13221614 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2137-Jan-25 14:12 < 00:01 Earth 0.149462328953918 0.149462263390369 0.149462394521623 5.81427779598916 5.8112108975884 2501608.091589075 0.0473466602153632 19.4942905164177 1.93970545849881 -84.9375710825427 5309007.18457039 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2144-Jan-03 10:26 < 00:01 Earth 0.296579992658664 0.296579295310049 0.296580690007775 5.79436035694073 5.79280967359556 2504141.934968046 0.101353078727996 28.0293829840017 2.352732464574 -30.8814927996619 4506691.97314529 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2150-Nov-12 07:12 < 00:01 Earth 0.460944495462875 0.460944191882661 0.460944799049096 4.1744982826175 4.17311334094188 2506646.799874007 0.465910407959323 4.6810943100028 2.76296015890257 -22.1477790322938 5812655.22157029 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2167-Mar-16 05:30 < 00:01 Earth 0.377434175975039 0.377433436120451 0.377434915831431 4.02624604714672 4.02449230629813 2512614.729428934 0.409629642399454 25.8160983832182 2.87895838880244 31.9965661162782 3585130.02322723 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2174-Feb-03 01:31 < 00:01 Earth 0.188400711399904 0.188400027554197 0.188401395250214 6.0055463972183 6.00319100917669 2515130.562861477 0.0688861471192591 32.1572818798827 1.94415036553875 49.4794910274028 5232388.54721488 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2181-Jan-17 20:55 < 00:01 Earth 0.198010398490311 0.198009612361093 0.198011184623496 5.98983927125203 5.98759233549774 2517671.371294370 0.07973691442614 33.5884283080591 2.08624294462365 -45.6280785181134 4811557.92953907 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35
2187-Dec-06 23:28 < 00:01 Earth 0.387313279247475 0.387312498132447 0.387314060363091 3.98339149504215 3.98166410204924 2520185.477976684 0.503093498388668 23.9104194886383 2.1284329686488 -33.8470184542313 5145775.32227567 T 445 CATAB v2.0c-linF95 2014-Sep-12 13:35:29 2014-Sep-12 13:35

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