Polaire (D-2A), a French CNES solar/ultraviolet astrophysics satellite, sister design to Tournesol. Diamant B from Kourou (ALD) failed on 5 December 1971 when the second stage malfunctioned, destroying the payload before orbit.
- Outcome
- Failure
- Orbit
- PO
- Polar orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 4th
- of 5 Diamant B flights
- Date and time
- 5 December 1971, 16:20 UTC
- Rocket
- Diamant B
- Builder
- SEREB
- Launch site
- Diamant Launch Area, Guiana Space Centre, French Guiana
- Payload
- Astrophysics
- Launches in 1971
- 119th of 133