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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1517437211489219 3.2339e-08  
a 3.19363550684997 1.5691e-08 au
q 2.709021371047233 1.0097e-07 au
i 2.665064242511627 3.5774e-06 deg
node 130.1791368280482 8.2707e-05 deg
peri 359.3117026589325 8.3684e-05 deg
M 188.0202829684523 1.2695e-05 deg
tp 2460196.366626035738
(2023-Sep-08.86662604)
7.3846e-05 TDB
period 2084.617834945622
5.71
1.5364e-05
4.206e-08
d
yr
n .1726935239472278 1.2727e-09 deg/d
Q 3.678249642652708 1.8072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3240  
   data-arc span      42335 days (115.91 yr)  
   first obs. used      1905-01-15  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43215  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:04:31  

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 1.45713434015584 1.45713368242994 1.45713499814903 1.08781355642109 0.144054229328401 2415779.140545732 1.54318888206492 61845.4946391803 1197.49204747617 5.88447763827815 6188996.59683838 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
1912-Oct-17 21:17 00:01 Jupiter 1.79459969219031 1.79459867857666 1.79460070580316 2.02399456984912 1.77555226037112 2419693.386705237 1.42412102290443 54.2308072183007 9.96808306901559 -84.5222856008238 1457818.90555214 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
1999-Feb-07 02:36 < 00:01 Jupiter 1.63488257962656 1.63488211055539 1.63488304869745 2.04263811124288 1.77092712284386 2451216.608624296 0.379788197437808 51.4659833291776 12.3711278954355 82.8519512898971 2208725.62026683 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
2009-Oct-21 21:39 < 00:01 Jupiter 1.39024279004545 1.39024245230085 1.39024312779006 1.06909648014229 n/a 2455126.401921937 0.219167745050296 36.8992439610845 16.8092994231257 -88.1711264216163 12363496.4827674 F 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
2020-Jul-26 20:10 < 00:01 Jupiter 1.51831410018975 1.51831368359529 1.51831451678309 1.24766078549088 0.664015522116979 2459057.340187959 0.29856515026347 508.504804458355 159.288059020035 9.23456352120059 1971222.19519647 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
2031-Apr-08 04:39 < 00:01 Jupiter 1.90861075100231 1.90861021314436 1.90861128886016 2.47683184066328 2.29065838002806 2462964.693784492 0.456505576911023 39.9837199694178 11.5467596774059 87.9959457828962 2583382.65380938 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
2106-Nov-26 18:12 00:01 Jupiter 1.93438504611857 1.93438404203386 1.93438605020328 3.44165379068477 3.31198234170378 2490590.258257638 1.3770527338379 55.9352446705151 23.1382822230121 53.7924765856774 1925601.89094727 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
2117-Jul-22 20:37 00:02 Jupiter 1.5311628666253 1.53116198910771 1.53116374414168 1.60846522624182 1.21687399131786 2494481.358839400 1.56046994476328 151.23214672632 88.0439907582438 -31.4033156394029 1218358.31346013 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
2128-Apr-14 23:08 00:02 Jupiter 1.37714220182055 1.37714183581844 1.37714256782289 1.00969013805216 n/a 2498400.463911722 1.63477428541155 72.8031943444539 16.869411571703 84.3553646584158 12152211.3287482 F 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04
2139-Jan-10 13:47 00:02 Jupiter 1.61094118048997 1.61093990611569 1.6109424548604 1.52435623842352 1.1278629374256 2502323.074610980 1.97591112542149 172.149476840011 72.3366459801027 4.1598804845699 923123.539640288 T 40 CATAB v2.0f-lin.ifort 2021-Apr-12 11:04:55 2021-Apr-12 11:04

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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