C/1984 A1 Bradfield

Cometa
C/1984 A1 (Bradfield)
Stella madreSole
Scoperta7 gennaio 1984
ScopritoreWilliam Ashley Bradfield
Designazioni
alternative		1984a; 1983 XIX
Parametri orbitali
(all'epoca 2445752,5
22 febbraio 1984[1])
Semiasse maggiore28,499 UA
Perielio1,357 UA
Afelio55,641 UA
Periodo orbitale152,15 anni
Inclinazione orbitale51,801°
Eccentricità0,95237
Longitudine del
nodo ascendente		356,859°
Argom. del perielio219,1651°
Par. Tisserand (TJ)1,065 (calcolato)
Ultimo perielio27 dicembre 1983
Prossimo perielio27 agosto 2126[2]
MOID da Terra0,478692
Dati osservativi
Magnitudine app.
  • 11(magnit.)[3] (max)
Magnitudine ass.
  • 9,6 (totale)
  • 13,5[4] (del nucleo)
Modifica dati su Wikidata · Manuale

C/1984 A1 (Bradfield) o Bradfield 1 è la dodicesima delle diciotto comete scoperte dall'astrofilo neozelandese William Ashley Bradfield: la cometa è periodica, la lettera iniziale C, lettera identificativa delle comete non periodiche, deriva solo dal fatto che non ne è ancora stato osservato un secondo ritorno.

Note

  1. ^ I dati di C/1984 A1 dal sito JPL.
  2. ^ I dati di C/1984 A1 dal sito di Seiichi Yoshida.
  3. ^ (EN) IAUC 3907: COMET BRADFIELD; SN IN NGC 4419; 2CG 195+04 = 'GEMINGA'; KR Aur; TT Ari
  4. ^ (EN) OAA computing section circular NK 467 Periodic Comet Bradfield 1984a

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