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2856 Roser (1933 GB)
Classification: Main-belt Asteroid          SPK-ID: 2002856
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .009113164517422322 4.1418e-08  
a 3.026097225331104 1.6679e-08 au
q 2.998519903470947 1.219e-07 au
i 9.895833793337189 5.209e-06 deg
node 16.80288448191217 2.3355e-05 deg
peri 203.8436328414906 0.00026777 deg
M 157.6589852463161 0.00026663 deg
tp 2458158.447888802686
(2018-Feb-08.94788880)
0.0014243 TDB
period 1922.749658431639
5.26
1.5897e-05
4.352e-08
d
yr
n .1872318626719441 1.548e-09 deg/d
Q 3.053674547191262 1.6831e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2212  
   data-arc span      31698 days (86.78 yr)  
   first obs. used      1933-04-14  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45429  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:32:43  

Additional Information
 Earth MOID = 1.99445 au 
 Jupiter MOID = 1.90475 au 
 T_jup = 3.222 
[ 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 11.1   n/a MPO309169  
diameter diameter 23.99 km 1.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
rotation period rot_per 13.73 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:
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
geometric albedo albedo 0.1223   0.013 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7

2856 Roser (1933 GB)          Discovered 1933-Apr-14 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1933 GB = 1935 SV = 1941 WL = 1946 UC = 1959 CM = 1962 WK = 1970 GG = 1972 RR3 = 1975 EK = 1977 QX1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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