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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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Jan-29 15:22 00:02 Jupiter 1.45713436654342 1.45713370770735 1.45713502564785 1.08781341341895 0.144053200239215 2415779.140484887 1.54492673955436 61958.4129455873 1199.7093472903 5.88456676080522 6177742.71161027 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
1912-Oct-17 21:17 00:01 Jupiter 1.79459971919753 1.794598704668 1.79460073372624 2.02399476891298 1.77555248982072 2419693.386672115 1.42563401350117 54.3406015985661 9.97678085951618 -84.5197217722298 1455676.60819658 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
1999-Feb-07 02:36 < 00:01 Jupiter 1.63488258798649 1.63488211885686 1.63488305711583 2.04263801631551 1.77092701323172 2451216.608634880 0.379806267820777 51.4698406325344 12.3816915843492 82.8446414029648 2208001.41779051 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
2009-Oct-21 21:39 < 00:01 Jupiter 1.39024278371858 1.3902424455755 1.39024312186167 1.06909618349008 n/a 2455126.401926189 0.219275372312873 36.9020934702343 16.8286993967147 -88.1565350132162 12349166.8565103 F 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
2020-Jul-26 20:10 < 00:01 Jupiter 1.5183140604644 1.51831364386529 1.51831447706239 1.24766055539097 0.664015063144637 2459057.340209359 0.299049149303447 508.733158856599 159.654494929529 9.26091813362569 1970798.33071656 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
2031-Apr-08 04:39 < 00:01 Jupiter 1.90861069370616 1.90861015528472 1.9086112321275 2.47683176647488 2.2906582929237 2462964.693795346 0.457504203310186 40.0877397154758 11.5700820615617 88.0036641413284 2581671.15725395 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
2106-Nov-26 18:12 00:01 Jupiter 1.93438486894309 1.93438386318042 1.93438587470576 3.44165294895255 3.31198145417603 2490590.258015518 1.37955152511127 56.0242043705167 23.1669553198841 53.7854392923617 1922614.31639862 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
2117-Jul-22 20:36 00:02 Jupiter 1.53116270747173 1.53116182790008 1.53116358704216 1.60846449952511 1.21687298097916 2494481.358559710 1.56333640026169 151.594601551158 88.0888519930734 -31.3472807056037 1216007.08123202 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
2128-Apr-14 23:08 00:02 Jupiter 1.37714222648604 1.37714186045252 1.37714259251977 1.00968981702882 n/a 2498400.463609669 1.63752402625268 72.9007950837697 16.8825864621758 84.3857516227371 12143325.2414998 F 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47
2139-Jan-10 13:47 00:02 Jupiter 1.61094145645197 1.61094018048806 1.61094273241202 1.52435692304948 1.12786394001187 2502323.074240014 1.97906281396452 172.272863277869 72.5183360748036 4.18965199101243 922336.197008269 T 39 CATAB v2.0f-lin.ifort 2021-Feb-24 00:47:50 2021-Feb-24 00:47

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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