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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1193590072026108 3.4183e-08  
a 2.360999434930612 6.6608e-09 au
q 2.079192886371369 8.1146e-08 au
i 8.380099322804133 3.5434e-06 deg
node 119.9702778588326 2.74e-05 deg
peri 279.5483225232626 3.1773e-05 deg
M 232.9831317569747 1.6723e-05 deg
tp 2459468.021030242661
(2021-Sep-10.52103024)
6.2136e-05 TDB
period 1325.080465417631
3.63
5.6074e-06
1.535e-08
d
yr
n .2716816143588211 1.1497e-09 deg/d
Q 2.642805983489855 7.4558e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2681  
   data-arc span      30194 days (82.67 yr)  
   first obs. used      1937-08-27  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41725  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:28:03  

Additional Information
 Earth MOID = 1.10677 au 
 Jupiter MOID = 2.7343 au 
 T_jup = 3.527 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456513.5 (2013-Aug-09.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1188130434346211 3.4047e-08  
q 2.080156613664081 8.0665e-08 au
tp 2456819.646734206401
(2014-Jun-11.14673421)
6.0286e-05 TDB
node 120.0096110742555 2.7388e-05 deg
peri 279.738976372066 3.182e-05 deg
i 8.381614182526585 3.5439e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2681  
   data-arc span      30194 days (82.67 yr)  
   first obs. used      1937-08-27  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41725  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:28:03  

Additional Information
 Jupiter MOID = 2.7343 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.159222491951445E-15 -2.738936582470116E-15 -5.323009974550775E-13 7.370790001482367E-15 -1.538287723489208E-13 -3.144369155130537E-16
q -2.738936582470116E-15 6.506808161894855E-15 1.292182247594294E-12 -1.73676277718858E-14 3.691800603122765E-13 9.389824692040982E-16
tp -5.323009974550775E-13 1.292182247594294E-12 3.634440329429584E-9 -6.907476797947441E-12 9.937984620442952E-10 1.482502502036897E-12
node 7.370790001482367E-15 -1.73676277718858E-14 -6.907476797947441E-12 7.501072218337068E-10 -7.434387385213632E-10 1.705829506542126E-11
peri -1.538287723489208E-13 3.691800603122765E-13 9.937984620442952E-10 -7.434387385213632E-10 1.012514762962879E-9 -1.650558049758871E-11
i -3.144369155130537E-16 9.389824692040982E-16 1.482502502036897E-12 1.705829506542126E-11 -1.650558049758871E-11 1.255950265502094E-11

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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