HS-312 Satellite Bus
Data current as of 2026-07-22.
The HS-312 bus accounts for 7 cataloged objects, of which 7 are in orbit and 0 are active. Most are built by HSES. The largest operator on this bus is Intelsat. The first launched in 1971, the most recent in 1975.
7
In orbit
0
Active
7
Total launched
0
Reentered
HS-312 launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged HS-312 satellites.
| Manufacturer | HSES |
|---|---|
| Purpose | Communication |
| Launch mass | 666 kg |
| Dry mass | 531 kg |
| Length | 5.3 m |
| Diameter | 2.4 m |
| Span | 5.3 m |
| Shape | Cyl + 2 Dish |
| Power | Solar cells (body mounted), batteries |
| Propulsion | SVM-4A |
| Equipment | 12 C-band transponders |
| Typical orbit | 1443 min period, 6° inclination |
Top operators
Top countries
I-INT 7
HS-312 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| INTELSAT 4-F1 INTELSAT IV F1 | 07815 | 1975-042A | INTEL | May 22, 1975 | 1451 min, 8.2° | Inactive | ◉ |
| INTELSAT 4-F8 INTELSAT IV F8 | 07544 | 1974-093A | INTEL | Nov 21, 1974 | 1443 min, 7.9° | Inactive | ◉ |
| INTELSAT 4-F7 INTELSAT IV F7 | 06796 | 1973-058A | INTEL | Aug 23, 1973 | 1452 min, 7.2° | Inactive | ◉ |
| INTELSAT 4-F5 INTELSAT IV F5 | 06052 | 1972-041A | INTEL | Jun 13, 1972 | 1438 min, 5.6° | Inactive | ◉ |
| INTELSAT 4-F4 INTELSAT IV F4 | 05775 | 1972-003A | INTEL | Jan 23, 1972 | 1443 min, 6.7° | Inactive | ◉ |
| INTELSAT 4-F3 INTELSAT IV F3 | 05709 | 1971-116A | INTEL | Dec 20, 1971 | 1446 min, 6.3° | Inactive | ◉ |
| INTELSAT 4-F2 INTELSAT IV F2 | 04881 | 1971-006A | INTEL | Jan 26, 1971 | 1457 min, 4.3° | Inactive | ◉ |
Frequently asked questions
How many HS-312 satellites are there?
The catalog lists 7 objects built on the HS-312 bus. 7 are in orbit and 0 have reentered.
How many HS-312 satellites are in orbit?
7 HS-312 objects are currently in orbit, of which 0 carry an active status.
Who builds the HS-312 bus?
The HS-312 bus is most commonly built by HSES.
When did the first HS-312 satellite launch?
The first cataloged HS-312 satellite launched in 1971, and the most recent in 1975.