A class-9 probe
A class-9 probe or more specifically class IX long-range multimission warp probe was a type of probe used by the Federation Starfleet in the 24th century.
The probes were housed within modified photon torpedo casings and had a range of 7.6x102 light-years. They were powered by a matter/antimatter warp field sustainer engine which could propel them at warp 9 for 12 hours or warp 8 for 14 days. In addition to standard sensors the probes could be fitted with mission specific modules. (TNG reference: Star Trek: The Next Generation Technical Manual)
The typical usage of this type of probe was as an emergency log/message capsule sent on a homing trajectory to the nearest Starbase or allied vessel. The USS Enterprise-D used a class-9 probe in just this manner in 2370 to send logs to Starbase 122 following an unprovoked attack in the Bandor system. (TNG reference: Star Trek: The Next Generation Technical Manual, TNG comic: "Strategy")
Connections
| Starfleet probe classes | ||||||||||||||||||||||||||||||||||||||||||||||
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| numbered classes | class-1 • class-2 • class-3 • class-4 • class-5 • class-6 • class-7 • class-8 • class-9 • class-10 | 
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| Quadros series | Quadros-1 • Quadros-3 • Quadros-4 | |||||||||||||||||||||||||||||||||||||||||||||
| other types | class-A • atmospheric • deep space • interface • microprobe • multispatial • sensor • Series Alpha • Vega Nine | |||||||||||||||||||||||||||||||||||||||||||||
External link
Class-9 probe article at Memory Alpha, the wiki for canon Star Trek.