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1269 Rollandia (1930 SH)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001269
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09910978919887017 3.9975e-08  
a 3.900333410428691 2.5957e-08 au
q 3.513772188315794 1.6018e-07 au
i 2.758817139795327 4.4348e-06 deg
node 134.7096957523206 8.8701e-05 deg
peri 19.4497548750406 9.1562e-05 deg
M 44.06998831656379 2.1737e-05 deg
tp 2458656.077542396341
(2019-Jun-21.57754240)
0.00016991 TDB
period 2813.526607873292
7.70
2.8087e-05
7.69e-08
d
yr
n .1279532949830957 1.2773e-09 deg/d
Q 4.286894632541589 2.853e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2973  
   data-arc span      43071 days (117.92 yr)  
   first obs. used      1902-03-03  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:50:15  

Additional Information
 Earth MOID = 2.52414 au 
 Jupiter MOID = .702847 au 
 T_jup = 3.055 
[ 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 8.7   n/a MPO473780 IRAS observations used: 18
diameter diameter 104.893 km 1.042 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 17.36 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.; Stephens, R.D. (2019) Minor Planet Bull. 46-4, submitted. (Hildas)]
geometric albedo albedo 0.048   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.775   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=15.20 deg.
U-B UB 0.271   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=15.20 deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1269 Rollandia (1930 SH)          Discovered 1930-Sep-20 by Neujmin, G. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1930 SH = 1926 GC1 = 1931 VY = 1936 LE = 1961 PB = A902 EA = A906 SA = A907 WB = A918 EG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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