Planetary Decoder (6856-1) is a Exploriens LEGO set released in 1996 with 81 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Exploriens sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 1 minifigure and 49 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
1996 (30 years ago — may be retired)
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Catalog scale
81 parts listed · 49 inventory lines tracked
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Minifigures
1 in this set's inventory — verify completeness when buying used
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Build manual
Digital booklet available on this page — use it to verify bag contents
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Gray era
Pre-2004 set — may use old light/dark gray instead of bluish gray
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Shipping weight (est.)
~105 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
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Market value
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Building instructions
Official LEGO instructions — read on BrickID
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Minifigures in Planetary Decoder
Parts in this set
49 parts · page 1 of 2 · updating…
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Antenna 8H Whip2569 · ×1 · Trans-Neon Green -
Brick 1 x 23004 · ×1 · White -
Brick 1 x 63009 · ×1 · Black -
Brick 2 x 33002 · ×1 · White -
Brick Round 2 x 2 with Axle Hole3941 · ×1 · Black -
Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin3747a · ×1 · Black -
Brick Special 1 x 2 x 2/3 with Studs on Sides4595 · ×2 · Black -
Brick Special 2 x 2 with Pin and Axle Hole6232 · ×1 · White -
![Cone 1 x 1 [No Top Groove]](https://cdn.rebrickable.com/media/parts/elements/618849.jpg)
Cone 1 x 1 [No Top Groove]4589 · ×1 · Trans-Neon Green -
Cylinder Half 2 x 4 x 46259 · ×2 · Trans-Dark Blue -
![Dish 2 x 2 Inverted [Radar]](https://cdn.rebrickable.com/media/parts/elements/3006349.jpg)
Dish 2 x 2 Inverted [Radar]4740 · ×2 · Trans-Neon Green -
![Dish 4 x 4 Inverted [Radar]](https://cdn.rebrickable.com/media/parts/elements/3006543.jpg)
Dish 4 x 4 Inverted [Radar]3960 · ×1 · Trans-Dark Blue -
![Dish 4 x 4 Inverted [Radar]](https://cdn.rebrickable.com/media/parts/elements/3006541.jpg)
Dish 4 x 4 Inverted [Radar]3960 · ×1 · Trans-Red -
![Dish 4 x 4 Inverted [Radar]](https://cdn.rebrickable.com/media/parts/elements/396026.jpg)
Dish 4 x 4 Inverted [Radar]3960 · ×2 · Black -
![Dish 4 x 4 Inverted [Radar]](https://cdn.rebrickable.com/media/parts/elements/3006549.jpg)
Dish 4 x 4 Inverted [Radar]3960 · ×1 · Trans-Neon Green -
Equipment Space Scanner30035 · ×1 · White -
Hinge Plate 1 x 2 with 2 Fingers and Hollow Studs4276b · ×2 · White -
![Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs]](https://cdn.rebrickable.com/media/parts/elements/427526.jpg)
Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs]4275b · ×4 · Black -
Hinge Tile 1 x 2 1/2 with 2 Fingers on Top4531 · ×2 · White -
![Panel 3 x 5 Solar / Deltoid with Clip [Hexagonal]](https://cdn.rebrickable.com/media/parts/ldraw/15/30034.png)
Panel 3 x 5 Solar / Deltoid with Clip [Hexagonal]30034 · ×2 · White -
Plate 1 x 23023 · ×2 · White -
Plate 1 x 43710 · ×1 · White -
Plate 1 x 63666 · ×2 · Black -
Plate 2 x 43020 · ×1 · White -
Plate 2 x 63795 · ×1 · White -
Plate 2 x 63795 · ×2 · Black -
Plate 2 x 83034 · ×1 · Black -
Plate Round 1 x 1 with Solid Stud6141 · ×2 · Trans-Neon Green -
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)4032a · ×2 · Black -
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)4032a · ×3 · White -
![Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]](https://cdn.rebrickable.com/media/parts/elements/601901.jpg)
Plate Special 1 x 1 with Clip Horizontal [Thick U Clip]6019 · ×1 · White -
![Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring]](https://cdn.rebrickable.com/media/parts/elements/408126.jpg)
Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring]4081b · ×2 · Black -
Plate Special 1 x 4 Offset with Bar Holes4590 · ×2 · Black -
Plate Special 2 x 2 with Bar Frame Octagonal30033 · ×1 · White -
Sticker Sheet for Sets 1737-1, 6815-1, 6854-1, 6856-1, 6899-1, 6938-1170900 · ×1 · [No Color/Any Color] -
Sticker Sheet for Sets 2154-1, 5129-1, 5384-1, 6856-1, 6900-1, 6915-1, 6958-1, 6975-1, 6982-1, 6999-1170909 · ×1 · [No Color/Any Color] -
Sticker Sheets for Sets 1737-1, 5129-1, 6854-1, 6856-1, 6899-1, 6938-1, 6958-1, 6982-1170910 · ×1 · [No Color/Any Color] -
Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole3940b · ×2 · White -
Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole3940b · ×2 · Black -
Tail 4 x 2 x 23479 · ×2 · Black -
Tail 4 x 2 x 23479 · ×2 · White -
Technic Axle 63706 · ×1 · Black -
![Technic Plate 2 x 4 [3 Holes]](https://cdn.rebrickable.com/media/parts/elements/370926.jpg)
Technic Plate 2 x 4 [3 Holes]3709 · ×1 · Black -
Tile 2 x 2 with Groove3068b · ×3 · Black -
Turntable 2 x 2 Plate - Top3679 · ×1 · Light Gray -
Turntable 2 x 2 Plate, Base3680 · ×1 · Black -
Wedge Plate 3 x 4 without Stud Notches4859 · ×1 · White -
Wedge Plate 8 x 6 x 2/3 with Grille30036 · ×2 · White