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Explorer 28
NASA satellite of the Explorer program. Explorer 28 was launched on May 29, 1965 aboard a Thor Delta C from Cape Canaveral & Kennedy. Latest status in GCAT: left Earth orbit for deep space (May 30, 1965).
COSPAR 1965-042ANORAD 1388United States
Identity
- Name in GCAT
- IMP 3
- Common name
- Explorer 28
- Payload designation
- IMP C
- Other names
- Explorer 28
- International designator
- 1965-042A
- NORAD catalog number
- 1388
- GCAT identifier
- S01388
- UN registration
- A/AC.105/INF.108
Mission
- Mission type
- Space science
- Use
- Civil government
- Program
- IMP
- Owner
- GSFC
- Country
- United States
- Builder
- NASA Goddard Space Flight Center
- Platform (bus)
- IMP
Launch
- Date
- May 29, 1965 · 12:00 UTC
- Launch record
- 1965-042Success
- Rocket
- Thor Delta C
- Spaceport
- Cape Canaveral & Kennedy · pad LC17B
Orbit and fate
- Orbit class (GCAT)
- DSO
- Perigee
- 195 km
- Apogee
- 264,252 km
- Inclination
- 33.86°
- Status
- Left Earth orbit for deep space
- Status date
- May 30, 1965
- Last known active
- May 11, 1967
- End of operations
- May 11, 1967
Size
- Mass
- 59 kg
- Dry mass
- 59 kg
- Length
- 0.3 m
- Diameter
- 0.70 m
- Span
- 5.0 m
Deep space
- Deep-space catalog entry
- D00069
- Final central body
- Earth
- Phase start
- May 30, 1965
- Phase outcome
- Reentered (orbital decay) · July 5, 1968
Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q9257135 (CC0).