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JPL Small-Body Database Browser
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1646 Rosseland (1939 BG)
Classification: Main-belt Asteroid          SPK-ID: 2001646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1199276574739547 3.4648e-08  
a 2.359796297010353 6.8676e-09 au
q 2.076791454994188 8.2215e-08 au
i 8.379542268904531 3.6359e-06 deg
node 119.9786515944092 2.7709e-05 deg
peri 279.6679254309084 3.2167e-05 deg
M 124.1121769011014 1.6741e-05 deg
tp 2458144.019644887520
(2018-Jan-25.51964489)
6.1159e-05 TDB
period 1324.067726017256
3.63
5.78e-06
1.582e-08
d
yr
n .2718894154174923 1.1869e-09 deg/d
Q 2.642801139026517 7.6912e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      29839 days (81.69 yr)  
   first obs. used      1937-08-27  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41559  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:25:41  

Additional Information
 Earth MOID = 1.10385 au 
 Jupiter MOID = 2.73512 au 
 T_jup = 3.528 
[ 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 11.82   n/a PDS3 (MPC 17262)  
diameter diameter 12.801 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 69.2 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Binzel, R.P.; Mulholland, J.D. (1983) Icarus 56, 519-533.]
[Angeli, C.A.; Lazzaro, D.; Florczak, A.; Betzler, A.S.; Carvano, J.M. (1999) Planet. Space Sci. 47, 699-714.]
geometric albedo albedo 0.202   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1646 Rosseland (1939 BG)          Discovered 1939-Jan-19 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1939 BG = 1937 QH = 1948 QR = 1955 NB = 1977 FK = 1980 ME 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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