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584 Semiramis (A906 AC)
Classification: Main-belt Asteroid          SPK-ID: 2000584
[ 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 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2337463047891485 4.2481e-08  
a 2.373112826465602 6.2644e-09 au
q 1.818406472431536 9.9997e-08 au
i 10.72413269245027 3.2055e-06 deg
node 282.0370209780558 2.5543e-05 deg
peri 85.40539668932101 2.64e-05 deg
M 183.3860277179116 9.3548e-06 deg
tp 2459655.586371769795
(2022-Mar-17.08637177)		 3.5661e-05 TDB
period 1335.291261443664
3.66		 5.2872e-06
1.448e-08		 d
yr
n .2696041009141199 1.0675e-09 deg/d
Q 2.927819180499668 7.7287e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2559  
   data-arc span      41861 days (114.61 yr)  
   first obs. used      1906-01-15  
   last obs. used      2020-08-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40431  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:28:01  

Additional Information
 Earth MOID = .854513 au 
 Jupiter MOID = 2.66354 au 
 T_jup = 3.483 
[ 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 8.5   n/a MPO502158 IRAS observations used: 11
magnitude slope G 0.24   n/a PDS3 (MPC 17259) Fit
diameter diameter 54.01 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 5.068 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[Harris, A.W.; Young, J.W.; Dockweiler, T.; Gibson, J.; et al. (1992) Icarus 95, 115-147.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Michalowski, T. (1996) Icarus 123, 456-462.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Durkee, R.I. (2011) http://home.earthlink.net/~shedofscience/index.html]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Connour, K.; Wright, T.; French, L.M. (2015) Minor Planet Bull. 42, 4.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1987   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
B-V BV 0.916   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=6.00, mean=14.06, max.=20.17) deg.
U-B UB 0.521   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=13.80, mean=17.29, max.=19.95) 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 Sl   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)

584 Semiramis (A906 AC)          Discovered 1906-Jan-15 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A906 AC = 1948 TW = A913 AB 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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