HS-306 Satellite Bus
Data current as of 2026-07-20.
The HS-306 bus accounts for 5 cataloged objects, of which 3 are in orbit and 0 are active. 2 have reentered. Most are built by HSES. The largest operator on this bus is NASA. The first launched in 1966, the most recent in 1969.
3
In orbit
0
Active
5
Total launched
2
Reentered
HS-306 launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged HS-306 satellites.
| Manufacturer | HSES |
|---|---|
| Purpose | Communication / Meteorology |
| Launch mass | 311 kg |
| Dry mass | 252 kg |
| Length | 1.8 m |
| Diameter | 1.4 m |
| Span | 1.8 m |
| Shape | Cyl + 2 Ant |
| Power | Solar cells (body mounted), batteries |
| Propulsion | SR-28-3 |
| Design life | 3 years (planned) |
| Equipment | ? |
| Typical orbit | 1436 min period, 0° inclination |
Top operators
Top countries
US 5
HS-306 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| ATS 5 ATS 5 | 04068 | 1969-069A | GSFC | Aug 12, 1969 | 1447 min, 0.3° | Inactive | ◉ |
| ATS 4 ATS 4 | 03344 | 1968-068A | GSFC | Aug 10, 1968 | 88 min, 29.0° | Reentered | ◉ |
| ATS 3 ATS 3 | 03029 | 1967-111A | GSFC | Nov 5, 1967 | 1436 min, 3.3° | Inactive | ◉ |
| ATS 2 ATS 2 | 02743 | 1967-031A | GSFC | Apr 6, 1967 | 89 min, 28.2° | Reentered | ◉ |
| ATS 1 ATS 1 | 02608 | 1966-110A | GSFC | Dec 7, 1966 | 1436 min, 5.1° | Inactive | ◉ |
Frequently asked questions
How many HS-306 satellites are there?
The catalog lists 5 objects built on the HS-306 bus. 3 are in orbit and 2 have reentered.
How many HS-306 satellites are in orbit?
3 HS-306 objects are currently in orbit, of which 0 carry an active status.
Who builds the HS-306 bus?
The HS-306 bus is most commonly built by HSES.
When did the first HS-306 satellite launch?
The first cataloged HS-306 satellite launched in 1966, and the most recent in 1969.