| Official name | RADUGA 28 |
| Alternative name | Raduga 28 |
| Cospar ID | 1991-087A |
| Norad ID | 21821 |
| Launch date | 1991-12-19 |
| Launch site | TTMTR |
| Launch vehicle | Proton-K Blok-DM-2 |
| Country/Organization | USSR / Russia |
| Type application | Communication |
| RCS size | LARGE |
| Decay date | ON ORBIT |
| Period (min) | 1434.93 |
| Inclination (deg) | 13.95 |
| Perigee (km) | 35735 |
| Apogee (km) | 35793 |
| Eccentricity | 0.000810871267196063 |
| Mean motion (revs. per day) | 1.0035332734001 |
| Semi-Major axis (km) | 42142.135 |
| Raan (deg) | 346.752 |
| Arg of perigee (deg) | 144.8983 |
| Shape | Cyl + 2 Pan |
| Mass (kg) | 1947.47 |
| Diameter (m) | 2.5 |
| Height (m) | 5 |
| Span (m^2) | 9.5 |
| Lifetime | 3 years |
| Contractors | NPO Prikladnoi Mekhaniki (NPO PM) |
| Equipment | 3 Delta-1 C-Band transponders, 3 Delta-2 C-Band transponders |
| Configuration | KAUR-3 |
| Power | 2 deployable solar arrays, batteries |
| Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|---|
| RADUGA 1 | 1975-123A | 1975-12-22 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 2 | 1976-092A | 1976-09-11 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 3 | 1977-071A | 1977-07-23 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 4 | 1978-073A | 1978-07-18 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 5 | 1979-035A | 1979-04-25 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 6 | 1980-016A | 1980-02-20 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 7 | 1980-081A | 1980-10-05 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 8 | 1981-027A | 1981-03-18 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 9 | 1981-069A | 1981-07-30 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 10 | 1981-102A | 1981-10-09 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 11 | 1982-113A | 1982-11-26 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 12 | 1983-028A | 1983-04-08 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 13 | 1983-088A | 1983-08-25 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 14 | 1984-016A | 1984-02-15 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 15 | 1984-063A | 1984-06-22 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 16 | 1985-070A | 1985-08-08 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 17 | 1985-107A | 1985-11-15 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 18 | 1986-007A | 1986-01-17 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 19 | 1986-082A | 1986-10-25 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 20 | 1987-028A | 1987-03-19 | TTMTR | Proton-K Blok-DM | ||
| RADUGA 21 | 1987-100A | 1987-12-10 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 22 | 1988-095A | 1988-10-20 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 23 | 1989-030A | 1989-04-14 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 24 | 1989-098A | 1989-12-15 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 25 | 1990-016A | 1990-02-15 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 26 | 1990-112A | 1990-12-20 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 27 | 1991-014A | 1991-02-28 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 28 | 1991-087A | 1991-12-19 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 29 | 1993-013A | 1993-03-25 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 30 | 1993-062A | 1993-09-30 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 31 | 1994-012A | 1994-02-18 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 32 | 1994-087A | 1994-12-28 | TTMTR | Proton-K Blok-DM-2 | ||
| RADUGA 33 | 1996-010A | 1996-02-19 | TTMTR | Proton-K Blok-DM-2 |
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