Holst Tempi
I. Mars
Main tempo: Quarter = 160
[VI]: Half = 80 (quarter value stays the same)
5 before [XI]: Half = 80
[XI]: back to quarter = 160
II. Venus
Adagio: quarter = 60 ~ 64
Andante: quarter = ~72
Meno mosso: quarter = ~66
Largo and Animato: just watch J
Adagio (come prima): quarter = 60~64
Andante: quarter = ~72
Tempo I: quarter = 60 ~ 64
III. Mercury
Vivace: dotted quarter = 134
IV. Jupiter
Quarter = 144
[V]: quarter stays the same!! Conducted in 3.
[VI] stringendo over 8 bars to dotted half note = 66
[VII] same as beginning
Andante Maestoso: quarter = 72
[X] like beginning
[XV]: dotted half = 72 (conducted in 1!)
[XVII]: quarter = 72
Presto: quarter = 152
V. Saturn
Adagio: quarter = 62~64
[I] Poco animato: quarter = ~68
[II] like beginning
Animato sections: quarter = 126 (suddenly!!!)
L’istesso tempo: quarter stays at 126 (“stesso” = same)
[V] Andante: quarter = ~68
VI. Uranus
Allegro: dotted half = 122
Lento: quarter = ~62
Largo: quarter = ~60
VII. Neptune
Andante: quarter = ~60
Allegreto: quarter = ~68

Bonus: photo of Gustav Holst watching you practice.