555 Norma

555 Norma
Discovery [1]
Discovered byM. F. Wolf
Discovery siteHeidelberg Obs.
Discovery date14 January 1905
Designations
(555) Norma
PronunciationItalian: [ˈnɔrma][2]
Named after
Norma
(character in Bellini's opera)[3]
1905 PT · 1928 FS
1939 BA · 1950 CC
1954 UH2 · 1968 HE1
main-belt · (outer) · background [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc112.20 yr (40,981 days)
Aphelion3.6636 AU
Perihelion2.7105 AU
3.1870 AU
Eccentricity0.1495
5.69 yr (2,078 days)
343.66°
0° 10m 23.52s / day
Inclination2.6462°
130.43°
356.51°
Physical characteristics
Dimensions27.89±0.68 km[5]
31.040±0.150 km[6]
31.80±0.58 km[7]
32.541±0.215 km[8]
33±3 km[9]
33.0±3.3 km[10]
40.02 km (derived)[4]
40.11±1.5 km[11]
19.508±0.002 h[12]
19.55±0.01 h[13]
30.6±0.5 h[14]
0.0528 (derived)[4]
0.0632±0.005[11]
0.08±0.02[10]
0.09±0.02[9]
0.0962±0.0150[8]
0.101±0.004[7]
0.119±0.018[5]
SMASS = B [1] · B [9][15]
C [4]
10.37±0.26[16] · 10.6[7][8][11] · 10.70[5][9] · 10.8[1][4][10]

555 Norma, provisional designation 1905 PT, is a background asteroid from the outer regions of the asteroid belt, approximately 33 kilometers in diameter. It was discovered on 14 January 1905, by German astronomer Max Wolf at Heidelberg Observatory in southwest Germany.[17] The asteroid was named after the title character of Bellini's opera Norma.[3]

  1. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ Norma (Dizionario Rai)
  3. ^ a b Cite error: The named reference springer was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Masiero-2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Masiero-2014 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference Ali-Lagoa-2013 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Ali-Lagoa-2016 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference SIMPS was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Pilcher-2017c was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Stephens-2012c was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference geneva-obs was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Kasuga-2015 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference MPC-Norma was invoked but never defined (see the help page).