2026-244Latest orbital launch: Falcon 9 · Starlink Group 15-16 · Oct 27, 2026 · VandenbergLaunch record →
sci-techmaventhe history of spaceflight, in data
sci-techmaven
Launch logAdvertise
  1. Home
  2. Spacecraft
  3. Calsphere 4A
// calibration · 1965

Calsphere 4A

Calsphere 4A was launched on August 13, 1965 aboard a Thor Ablestar from Vandenberg. Latest status in GCAT: in orbit.

COSPAR 1965-065HNORAD 1520United States

Identity

Name in GCAT
Calsphere
Common name
Calsphere 4A
Payload designation
NRL PL158?
International designator
1965-065H
NORAD catalog number
1520
GCAT identifier
S01520
UN registration
A/AC.105/INF.113

Mission

Mission type
Calibration
Use
Defense
Program
NRL Cal
Owner
NRL
Country
United States
Builder
Naval Research Lab
Platform (bus)
NRL 14"

Launch

Date
August 13, 1965 · 22:11 UTC
Launch record
1965-065Success
Spaceport
Vandenberg · pad 75-1-1

Orbit and fate

Orbit class (GCAT)
LEO/P
Perigee
1,083 km
Apogee
1,195 km
Inclination
90.04°
Status
In orbit
Last known active
Aug 13, 1965
End of operations
Aug 13, 1965

Size

Mass
4 kg
Dry mass
4 kg
Length
0.4 m
Diameter
0.40 m
Span
0.4 m

Source: GCAT payload, deep-space and lander catalogs, Jonathan C. McDowell (CC BY 4.0); Wikidata Q18327723 (CC0).