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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 458 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2226338073109678 1.1283e-08  
a 1.457960681567809 3.8107e-10 AU
q 1.133369344120674 1.659e-08 AU
i 10.8289993701657 2.2521e-06 deg
node 304.3345371635228 8.7912e-06 deg
peri 178.7956772122569 9.9165e-06 deg
M 231.4013672840452 4.1724e-06 deg
tp 2457230.194711068160
(2015-Jul-26.69471107)
7.4625e-06 JED
period 643.0091381078788
1.76
2.5209e-07
6.902e-10
d
yr
n .5598676265462376 2.195e-10 deg/d
Q 1.782552019014944 4.659e-10 AU
  Orbit Determination Parameters
   # obs. used (total)      5173  
   # delay obs. used      1  
   # Doppler obs. used      3  
   data-arc span      18788 days (51.44 yr)  
   first obs. used      1963-07-15  
   last obs. used      2014-12-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43798  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:28:40  

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 LCDB (Rev. 2015-May); Warner et al., 2009 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]
[Koehn, B.W.; Bowell, E.L.G.; Skiff, B.A.; Sanborn, J.J.; et al. (2014) Minor Planet Bul. 41, 286-300.]
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
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 0.314929510723426 0.314928997746167 0.314930023701055 5.57861555284178 5.57709874134836 2415380.562249808 0.0857100183155332 21.5037878548245 2.39740615307191 -31.1385955984293 4623541.02023686 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1907-Nov-05 03:31 < 00:01 Earth 0.47148573298537 0.471485596190144 0.471485869781137 4.39449421814115 4.3932080478833 2417884.646199004 0.29610444193627 3.94307331844053 2.74319432172646 -4.54122968766147 6582917.66373724 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1917-Apr-20 21:19 < 00:01 Earth 0.499257057167922 0.499256955078294 0.49925715925819 4.81677969659659 4.81567159056572 2421339.388380326 0.215997915953826 4.32003613889308 3.20855113960234 13.9497425290769 7018566.55882632 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1924-Mar-05 22:13 < 00:01 Earth 0.359786238781253 0.359785874101616 0.359786603461055 4.59606462657932 4.59445302445701 2423850.425535920 0.139465317376261 14.3752232037542 2.62330910233717 27.3313271183557 3807049.30000699 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1931-Jan-30 04:07 < 00:01 Earth 0.174073023170222 0.174072753948917 0.174073292392978 5.92081953572152 5.91823374182766 2426371.671224699 0.0332233711081121 13.1478722034196 1.85167841905095 53.4492510793495 5326825.14095086 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1938-Jan-13 22:04 < 00:01 Earth 0.215005472746197 0.215005159628724 0.21500578586419 6.08405460004195 6.08201735881169 2428912.419541672 0.0317767258248734 13.9057139817581 2.15982092023757 -42.3458876458223 4873880.31703568 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1944-Nov-27 01:41 < 00:01 Earth 0.403009221959047 0.403008984284208 0.403009459633422 3.62609878030538 3.62427502331107 2431421.569914892 0.232123318756958 7.11786672145389 2.18567556945362 -31.901074969786 5027099.65034694 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1961-Apr-04 09:08 < 00:01 Earth 0.442492043939693 0.442491939117437 0.442492148761984 3.70783557367844 3.70621121638252 2437393.880357023 0.164823556297285 4.71368981304174 2.25017943154409 8.37948288261219 4589160.09493004 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1968-Feb-11 13:46 < 00:01 Earth 0.266271308012771 0.266271113906292 0.26627150211964 6.0668869599146 6.06523735049021 2439898.073412265 0.0274293200939764 8.14543135598018 2.0746463101582 26.7269259345561 4624656.62163535 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1975-Jan-23 07:39 < 00:01 Earth 0.151134257063041 0.151134236308086 0.15113427781804 5.8253096403003 5.8222824251724 2442435.819052648 0.0182408278816082 5.09614612897358 1.89743796776397 -86.2787330449762 5507495.41789766 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1981-Dec-29 08:05 < 00:01 Earth 0.308489383663833 0.308489253928188 0.308489513399608 5.66527327746057 5.66374848857249 2444967.836507345 0.0284189071665485 6.33293944107528 2.39168739240962 -28.6068821719971 5090805.81804752 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
1988-Nov-06 14:56 < 00:01 Earth 0.46764022656348 0.467640157464657 0.46764029566153 4.30590170849363 4.30457827193073 2447472.122254977 0.0816624987510258 3.78690474541086 2.67264269277218 -5.66915115718545 6689791.68449633 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2005-Mar-08 22:07 < 00:01 Earth 0.36556725818175 0.365567197819434 0.365567318544063 4.41229501009712 4.41064281304765 2453438.421512347 0.0430335664357728 5.12209023478563 1.88141802771956 4.98970548613811 4023633.91104831 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2012-Jan-31 11:01 < 00:01 Earth 0.178675898854329 0.178675828554957 0.17867596915347 5.94519766776847 5.9426888349232 2455957.958757680 0.0144545437196397 3.67639349253671 1.78308765795424 39.3858308450694 5197716.86645111 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2019-Jan-15 06:01 < 00:01 Earth 0.208598631645644 0.208598537878171 0.208598725413082 6.0449190692687 6.04280564672212 2458498.750801236 0.0189176330176029 4.55828089965505 2.1340363929612 -37.7112496090756 4983653.25414511 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2025-Nov-30 02:18 < 00:01 Earth 0.397647388440458 0.397647292638964 0.397647484240973 3.72885342361552 3.72705602835265 2461009.595552249 0.0949691410148883 4.48683597585804 1.68514516166599 -15.801689082525 5066528.93275753 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2042-Apr-06 19:02 < 00:01 Earth 0.446141842283973 0.446141767612382 0.446141916955631 3.72522627988129 3.7236227383057 2466981.292721849 0.168224848258902 4.38874712024483 2.42265989741172 7.00844254447569 4901460.0431322 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2049-Feb-12 05:38 < 00:01 Earth 0.272555539521108 0.272555318401695 0.272555760640064 6.05906537709842 6.05745172636573 2469484.734555088 0.027123097784954 9.93633941515578 2.28154085390459 31.8475257684034 4800100.21933298 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2056-Jan-24 11:03 < 00:01 Earth 0.149782197669029 0.149782149937884 0.149782245400645 5.82075962089244 5.81770268346194 2472021.960386199 0.0232867518823462 7.96589528624157 1.95797752795856 -80.9188232488975 5233428.63622994 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2062-Dec-31 08:25 < 00:01 Earth 0.302953299692791 0.302953000172483 0.30295359921368 5.73224881638739 5.73071430622091 2474554.850492843 0.0508434114544634 12.2939912335433 2.33314904002929 -28.6632877915234 4509276.76506559 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2069-Nov-08 21:29 < 00:01 Earth 0.46472807210148 0.464727966657778 0.464728177546398 4.2454143199618 4.24406360888372 2477059.395097787 0.208498500518471 3.84506755995497 2.64325390624314 -7.49255481052407 6496499.57669897 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2086-Mar-11 22:55 < 00:01 Earth 0.371310295008843 0.371309916993725 0.371310673024613 4.22586081593751 4.22416238668876 2483026.454761600 0.185480095857172 14.5929715173524 2.84853334592718 30.5977824997303 3704383.00010454 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2093-Jan-31 15:47 < 00:01 Earth 0.182464153671614 0.182463819996503 0.182464487348549 5.97491615968619 5.97247164959543 2485544.157526520 0.0368134486333281 16.6686533495314 1.94493161516131 52.1872630015252 5257993.12975871 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2100-Jan-16 11:39 < 00:01 Earth 0.203878863176367 0.203878418260518 0.203879308093726 6.01492057262043 6.0127474275585 2488084.985234496 0.0465501703103221 18.6719649198398 2.10750725718564 -43.1508667353199 4732692.91813321 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2106-Dec-04 02:22 < 00:01 Earth 0.392290985736092 0.39229056615608 0.392291405316286 3.85303615936078 3.85127296444964 2490597.598771735 0.310507909745059 12.6193863954956 2.09154764699528 -32.4654742960042 5083471.75839994 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2123-Apr-10 05:51 < 00:01 Earth 0.449703084408817 0.449702875919099 0.449703292905988 3.75372791546682 3.75214915937808 2496568.744042500 0.454725697539689 4.90234171499397 2.87452348689884 21.4712798288314 4907623.43366039 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2130-Feb-14 22:11 < 00:01 Earth 0.278164966294558 0.278164346929856 0.278165585660247 6.03818406559262 6.0365974904778 2499071.424502987 0.0685554883723093 26.0185203915695 2.30531723319055 32.3952630023333 4649584.50533795 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2137-Jan-25 14:12 < 00:01 Earth 0.149462327057127 0.149462261520589 0.149462392596581 5.81427777999088 5.81121088154274 2501608.091590874 0.0473317460938133 19.4921634115166 1.93932966529652 -84.9387082759307 5310045.07035734 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2144-Jan-03 10:26 < 00:01 Earth 0.296579965474854 0.296579268191552 0.296580662759165 5.7943606019182 5.79280991849645 2504141.934973175 0.101338051500587 28.0257371998124 2.35252703253018 -30.8814758595024 4507086.80875276 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2150-Nov-12 07:12 < 00:01 Earth 0.460944476760378 0.460944172685905 0.460944780837543 4.17449804707035 4.17311310526035 2506646.799878459 0.465803348630065 4.67875972189774 2.75910669972764 -22.225764669651 5821334.31255832 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2167-Mar-16 05:30 < 00:01 Earth 0.377434207375343 0.377433467602072 0.377434947149359 4.02624512854344 4.02449138744048 2512614.729441886 0.409561537731005 25.8119066727161 2.87696362585979 31.9928958415223 3587204.27826168 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2174-Feb-03 01:31 < 00:01 Earth 0.188400740467763 0.188400056683277 0.18840142425685 6.00554649626216 6.00319110862289 2515130.562864726 0.0688735176449071 32.1532872839994 1.94339065994235 49.4786962434994 5234369.42733497 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2181-Jan-17 20:55 < 00:01 Earth 0.198010367237067 0.198009581200874 0.198011153277227 5.98983928081305 5.98759234470763 2517671.371299730 0.0797204068799942 33.5843437901199 2.08599965165118 -45.6285912143843 4812160.27803198 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28
2187-Dec-06 23:28 < 00:01 Earth 0.387313247990849 0.387312466939089 0.387314029043197 3.98339200073527 3.98166460782232 2520185.477987507 0.503014324422055 23.9073778254034 2.12589420364354 -33.8448448579736 5151541.20997647 T 458 CATAB v2.0c-linF95 2015-Mar-09 13:28:54 2015-Mar-09 13:28

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