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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09870500604911689 1.8331e-08  
a 3.899789404549956 2.0468e-08 au
q 3.51486066778357 7.4138e-08 au
i 2.75883594426459 5.5128e-07 deg
node 134.7107174821141 3.8088e-06 deg
peri 19.44664147072541 9.6059e-06 deg
M 94.79111893462525 1.1329e-05 deg
tp 2458655.829055175701
(2019-Jun-21.32905518)
8.7179e-05 TDB
period 2812.937996023054
7.70
2.2145e-05
6.063e-08
d
yr
n .1279800694181563 1.0075e-09 deg/d
Q 4.284718141316341 2.2488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3591  
   data-arc span      43580 days (119.32 yr)  
   first obs. used      1902-03-03  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42464  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:10:39  

Additional Information
 Earth MOID = 2.52599 au 
 Jupiter MOID = .703541 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 8.77   n/a E2021B10 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. 2020-October); 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, 406-412.]
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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