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555 Norma (A905 AF)
Classification: Main-belt Asteroid          SPK-ID: 2000555
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1517437199511792 3.2382e-08  
a 3.19363550854372 1.5708e-08 au
q 2.70902137630912 1.0114e-07 au
i 2.665064169320991 3.5861e-06 deg
node 130.1791370813202 8.273e-05 deg
peri 359.3117027644275 8.3707e-05 deg
M 188.0202824685494 1.2695e-05 deg
tp 2460196.366629722718
(2023-Sep-08.86662972)		 7.3847e-05 TDB
period 2084.617836603993
5.71		 1.5379e-05
4.211e-08		 d
yr
n .1726935238098454 1.2741e-09 deg/d
Q 3.67824964077832 1.8091e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3236  
   data-arc span      42335 days (115.91 yr)  
   first obs. used      1905-01-15  
   last obs. used      2020-12-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43246  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:47:41  

Additional Information
 Earth MOID = 1.72382 au 
 Jupiter MOID = 1.37557 au 
 T_jup = 3.176 
[ 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 10.84   n/a E2021B10  
diameter diameter 31.040 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 19.508 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2012) Minor Planet Bull. 39, 80-82.]
[Pilcher, F. (2017) Minor Planet Bull. 44, 112-114.]
geometric albedo albedo 0.119   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

555 Norma (A905 AF)          Discovered 1905-Jan-14 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A905 AF = 1928 FS = 1939 BA = 1950 CC = 1954 UH2 = 1968 HE1 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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