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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1193590068277221 3.438e-08  
a 2.360999434860425 6.6803e-09 au
q 2.079192887194671 8.1564e-08 au
i 8.380099374721997 3.5657e-06 deg
node 119.9702779509033 2.7564e-05 deg
peri 279.5483228861656 3.1978e-05 deg
M 232.9831313724131 1.6784e-05 deg
tp 2459468.021031637300
(2021-Sep-10.52103164)
6.2346e-05 TDB
period 1325.080465358544
3.63
5.6239e-06
1.54e-08
d
yr
n .2716816143709356 1.1531e-09 deg/d
Q 2.642805982526179 7.4777e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2637  
   data-arc span      30104 days (82.42 yr)  
   first obs. used      1937-08-27  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41988  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:00:53  

Additional Information
 Earth MOID = 1.10677 au 
 Jupiter MOID = 2.7343 au 
 T_jup = 3.527 
[ 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 12.0   n/a MPO473786  
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-August); 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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