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433 Eros (A898 PA)
Classification: Amor [NEO]          SPK-ID: 2000433
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 658 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2229512647434284 9.6497e-09  
a 1.458045729081037 2.1374e-10 au
q 1.132972589728666 1.4063e-08 au
i 10.83054121829922 1.1645e-06 deg
node 304.2993259000444 3.8525e-06 deg
peri 178.8822959227224 4.088e-06 deg
M 271.0717325705167 1.4389e-06 deg
tp 2459159.351922368362
(2020-Nov-05.85192237)		 2.5792e-06 TDB
period 643.0654021001488
1.76		 1.414e-07
3.871e-10		 d
yr
n .5598186418120109 1.231e-10 deg/d
Q 1.783118868433408 2.6139e-10 au
   Orbit Determination Parameters
   # obs. used (total)      8767  
   # delay obs. used      4  
   # Doppler obs. used      2  
   data-arc span      46330 days (126.84 yr)  
   first obs. used      1893-10-29  
   last obs. used      2020-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .28397  
   source      ORB  
   producer      Giorgini  
   solution date      2020-Sep-06 18:22:27  

Additional Information
 Earth MOID = .148623 au 
 Jupiter MOID = 3.2865 au 
 T_jup = 4.582 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.4   n/a MPO492754  
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. 2020-October); 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 Bull. 41, 286-300.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 22-36.]
[Aznar, A.M.; Predatu, M.; Vaduvescu, O.; Oey, J. (2018) arXiv:1801.09420. Romanian J. Phys. 62, 904 (2017).]
[Hasegawa, S.; Kuroda, D.; Kitazato, K.; Kasuga, T.; et al. (2018) Pub. Astron. Soc. Japan 70, A114.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 27-40.]
geometric albedo albedo 0.25   0.06 Veverka et al. (2000) Science v.289,pp.2088-2097 average
B-V BV 0.921   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=48; phase (min.=8.73, mean=34.88, max.=57.19) deg.
U-B UB 0.531   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A898 PA)          Discovered 1898-Aug-13 by Witt, G. at Berlin
Independent discovery earlier the same night by A. Charlois, Nice.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A898 PA = 1956 PC 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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