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1227 Geranium (1931 TD)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001227
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1923876098936093 3.881e-08  
a 3.21888003626018 1.5916e-08 au
q 2.59960739954983 1.2654e-07 au
i 16.49252088392963 4.0298e-06 deg
node .6575824266577877 1.3732e-05 deg
peri 303.0554061459768 1.6377e-05 deg
M 228.1832968378579 1.0981e-05 deg
tp 2459972.866730777417
(2023-Jan-28.36673078)
6.5725e-05 TDB
period 2109.38383687119
5.78
1.5645e-05
4.283e-08
d
yr
n .1706659516904146 1.2658e-09 deg/d
Q 3.83815267297053 1.8978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2972  
   data-arc span      32613 days (89.29 yr)  
   first obs. used      1931-10-05  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:53:41  

Additional Information
 Earth MOID = 1.62591 au 
 Jupiter MOID = 1.73521 au 
 T_jup = 3.097 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457069.5 (2015-Feb-16.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1906929455995301 3.8674e-08  
q 2.609930135947257 1.2521e-07 au
tp 2457859.614351681801
(2017-Apr-16.11435168)
6.3794e-05 TDB
node .7171633503638246 1.375e-05 deg
peri 302.1607702251712 1.6402e-05 deg
i 16.47141029544382 4.0258e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2972  
   data-arc span      32613 days (89.29 yr)  
   first obs. used      1931-10-05  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:53:41  

Additional Information
 Jupiter MOID = 1.73521 au 
 T_jup = 3.097 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.495666984456547E-15 -4.816431719098971E-15 5.438325479681559E-13 4.536154273328239E-15 6.808251428944434E-14 2.904188320354432E-15
q -4.816431719098971E-15 1.567845668560895E-14 -1.686852153185562E-12 -1.08678441636583E-14 -2.322486528330628E-13 -1.040862243145565E-14
tp 5.438325479681559E-13 -1.686852153185562E-12 4.069634383096969E-9 8.251988962776118E-12 5.966857972026871E-10 -6.077748533069501E-12
node 4.536154273328239E-15 -1.08678441636583E-14 8.251988962776118E-12 1.890495533989857E-10 -1.79351677083528E-10 -1.519208391303256E-11
peri 6.808251428944434E-14 -2.322486528330628E-13 5.966857972026871E-10 -1.79351677083528E-10 2.6903722111308E-10 1.371188260135924E-11
i 2.904188320354432E-15 -1.040862243145565E-14 -6.077748533069501E-12 -1.519208391303256E-11 1.371188260135924E-11 1.620690723537934E-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 10.86   n/a E2021B10  
diameter diameter 46.269 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.363 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.]
geometric albedo albedo 0.071   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1227 Geranium (1931 TD)          Discovered 1931-Oct-05 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 TD = 1934 CL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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