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9 Metis
Classification: Main-belt Asteroid          SPK-ID: 2000009
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1226961681710257 1.8188e-08  
a 2.385914524307794 2.9802e-09 AU
q 2.093171954591632 4.3551e-08 AU
i 5.575230886890587 2.0033e-06 deg
node 68.94446625208168 2.5733e-05 deg
peri 5.820534144554108 2.7704e-05 deg
M 49.27219403171463 1.0633e-05 deg
tp 2456216.261601920967
(2012-Oct-15.76160192)
3.9678e-05 JED
period 1346.110612930299
3.69
2.5221e-06
6.905e-09
d
yr
n .2674371604695466 5.0107e-10 deg/d
Q 2.678657094023956 3.3458e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2290  
   data-arc span      69720 days (190.88 yr)  
   first obs. used      1822-04-16  
   last obs. used      2013-03-05  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .4699  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Mar-29 15:13:33  

Additional Information
 Earth MOID = 1.10749 AU 
 T_jup = 3.519 
[ 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 6.28 mag n/a PDS3 (MPC 17257)  
magnitude slope G 0.17   n/a PDS3 (MPC 17257) Fit
diameter diameter 190 km n/a Dunham Occult. list: Kristensen 1984b Yeomans E-mail 2001-Apr-04
rotation period rot_per 5.079 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List:
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 200-220.]
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 529-546.]
[Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.]
[Zappala, V.; van Houten-Groeneveld, I. (1979) Icarus 40, 289-296.]
[Schober, H.J.; Surdej, J. (1979) Astron. Astrophys. Suppl. Ser. 38, 269-274.]
[Zeigler, K.W.; Florence, W.B. (1985) Icarus 62, 512-517.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[Richmond, E.H.; Neely, A.W. (1994) Minor Planet Bul. 21, 23-24.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT). http://astro.troja.mff.cuni.cz/projects/aster oids3D/web.php]
geometric albedo albedo 0.118   n/a EAR-A-5-DDR-ALBEDOS-V1.0:TRIAD TRIAD quality code 3
B-V BV .858 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=23; phase (min.=2.98, mean=9.80, max.=26.91) deg.
U-B UB .496 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=20; phase (min.=2.98, mean=10.36, max.=26.91) 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

9 Metis          Discovered 1848-Apr-25 by Graham, A. at Markree
Apr. 26 is date of first measurement.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
2004-Aug-19 09:55 < 00:01 Vesta 0.0346469168919316 0.0346466249689056 0.0346472088154885 4.47703523345611 4.47703446637812 2453236.913199845 0.0327122094001779 18.5397312731606 11.7664624715159 -53.6361809324675 390210.725902345 T 88 CATAB v2.0c-linF95 2013-Mar-29 15:46:58 2013-Mar-29 16:02

Alternate Designations
 1974 QU2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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