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349 Dembowska (1892 T)
Classification: Main-belt Asteroid          SPK-ID: 2000349
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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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.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09147334931132989 2.6938e-08  
a 2.923794657440855 5.7756e-09 au
q 2.656345367426168 7.8948e-08 au
i 8.246061483516558 3.2108e-06 deg
node 32.35139020432105 2.4817e-05 deg
peri 346.2250099673677 3.073e-05 deg
M 306.8977931135942 1.8253e-05 deg
tp 2457869.857330201314
9.2708e-05 JED
period 1826.07549776424
n .1971440942287254 5.8415e-10 deg/d
Q 3.191243947455542 6.3039e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2257  
   data-arc span      45044 days (123.32 yr)  
   first obs. used      1892-12-11  
   last obs. used      2016-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60338  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:27:11  

Additional Information
 Earth MOID = 1.65832 au 
 Jupiter MOID = 2.2624 au 
 T_jup = 3.257 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.93 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
magnitude slope G 0.37   n/a PDS3 (MPC 17258) Fit
diameter diameter 139.77 km 4.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 4.701 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Chang, Y.C.; Chang, C.-s. (1963) Acta Astron. Sin. 11, 139-149.]
[Tedesco, E.F. (1979) PhD Dissertation, New. Mex. State Univ. 280pp.]
[Zappala, V.; van Houten-Groeneveld, I.; van Houten, C.J. (1979) Astron. Astrophys. Suppl. Ser. 35, 213-221.]
[Haupt, H. (1980) Mitt. Univ. Graz No. 69.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Lupishko, D.F.; Velichko, F.P. (1987) Kin. Fiz. Neb. Tel 3(1), 57-65; Kinematics and Physics of Celestial Bodies 3(1), 63-71.]
[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.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Behrend, R. (2002) Observatoire de Geneve web site,]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Majaess, D.J.; Tanner, J.; Savoy, J.; Sampson, B. (2008) Minor Planet Bul. 35, 88-91.]
[Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT). oids3D/web.php]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Alton, K.B. (2015) Minor Planet Bul. 42, 146-148.]
geometric albedo albedo 0.3840   0.025 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV .945 mag .028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=25; phase (min.=2.27, mean=13.08, max.=21.36) deg.
U-B UB .540 mag .042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=6; phase (min.=3.18, mean=12.04, max.=20.64) deg.
Tholen spectral type spec_T R   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B R   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)

349 Dembowska (1892 T)          Discovered 1892-Dec-09 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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