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JPL Small-Body Database Browser
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349 Dembowska (A892 XB)
Classification: Main-belt Asteroid          SPK-ID: 2000349
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 111 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09152605983670747 3.2051e-08  
a 2.922928311458529 5.2662e-09 au
q 2.655404199925569 9.3473e-08 au
i 8.245614732749722 3.4336e-06 deg
node 32.33973714281009 2.5822e-05 deg
peri 345.54667327173 3.2893e-05 deg
M 223.6637281333538 2.1464e-05 deg
tp 2459691.749111166299
0.00010935 TDB
period 1825.263934628296
n .197231749978839 5.3303e-10 deg/d
Q 3.190452422991489 5.7482e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2708  
   data-arc span      46523 days (127.37 yr)  
   first obs. used      1892-12-11  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58816  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:04:06  

Additional Information
 Earth MOID = 1.65859 au 
 Jupiter MOID = 2.26765 au 
 T_jup = 3.257 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.9   n/a MPO492752 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. 2019-August); 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.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[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.]
[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.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[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 Bull. 35, 88-91.]
[Durech, J. (2011) Database of Asteroid Models from Inversion Techniques (DAMIT).]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Alton, K.B. (2015) Minor Planet Bull. 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 0.945   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=25; phase (min.=2.27, mean=13.08, max.=21.36) deg.
U-B UB 0.540   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A892 XB)          Discovered 1892-Dec-09 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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