| Title | Symphony No. 51 in B-flat major | 
| Alternative title | Sinfonia No.51 | 
| Creators | Joseph Haydn (composer) | 
| Opus | Hob.I:51n86 I:51 | 
| Instrumentation | orchestra | 
| Number of movements | 4 | 
| Keys | B flat major | 
| Composed | 1773 | 
| First published | 1782 | 
| Dedication | — | 
| Tempo markings | — | 
| Metronome markings | — | 
| Time signatures | — | 
| Average duration (sec) | 1440 | 
| Number of measures | — | 
| Composition types | Symphonies | 
| Period | Classical | 
| View on IMSLP |  | 
| Code |  | 
| Title click for details | Metronome | Key | Measures | 
|---|---|---|---|
| Vivace | — | B flat major | 209 | 
| Adagio | — | E flat major | 93 | 
| Minuet – Trio I – Trio II | — | B flat major | 56 | 
| Finale. Allegro | — | B flat major | 114 | 
| Details | Section | Arranged for | Arranger | 
|---|---|---|---|
| view | Adagio (No.2) | violin, piano and organ | Jean-Amédée Lefroid de Méreaux | 
| Details | Section | Type | Publisher | Date | File | 
|---|---|---|---|---|---|
| view | Complete | — | Haydn Society | 1951 | Complete Score · view | 
| view | Complete | — | Haydn Society | 1951 | Complete Score · view | 
| view | Complete | parts | Sieber | — | Oboe 1 · view Violins I, II · view | 
| view | Complete | parts | Haydn Society | 1951 | Oboe 1, 2 · view Horn 1, 2 (B/B alto/E) · view Violins I · view Violins II · view Violas · view Cellos/Basses/Bassoon · view | 
| view | Adagio (No.2) | Arrangement for violin, piano and organ | Heugel | 1874 | Complete Score · view | 
(No recordings)
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