Standard magnitudes for Okean satellites ---------------------------------------- From Russell's observations (1980 Jan 01 to 1995 Nov 30) I have derived standard magnitudes (1000 km, 90 deg) for ten Okean satellites. OKEAN-E COSMOS 1076 1979-011A 78 5.48 +/- 0.13 0.0116 +/- 0.0044 COSMOS 1151 1980-005A 26 5.66 +/- 0.18 0.0017 +/- 0.0061 ------------------------------------------------------------------- ALL OKEAN-E 104 5.53 +/- 0.11 0.0093 +/- 0.0037 OKEAN-OE COSMOS 1500 1983-099A 30 5.59 +/- 0.19 0.0175 +/- 0.0054 COSMOS 1602 1984-105A 6 6.47 +/- 0.12 0.0219 +/- 0.0032 ------------------------------------------------------------------- ALL OKEAN-OE 36 5.75 +/- 0.17 0.0187 +/- 0.0048 OKEAN-O1 COSMOS 1766 1986-055A 18 4.89 +/- 0.22 -0.0011 +/- 0.0061 COSMOS 1869 1987-062A 9 3.81 +/- 0.54 -0.0267 +/- 0.0110 OKEAN-O1 3 1988-056A 20 5.30 +/- 0.14 0.0187 +/- 0.0047 OKEAN-O1 5 1990-018A 8 5.90 +/- 0.08 0.0227 +/- 0.0028 OKEAN-O1 6 1991-039A 2 6.19 +/- 0.00 0.0137 +/- 0.0000 OKEAN-O1 NO. 7 1994-066A 10 5.03 +/- 0.19 -0.0004 +/- 0.0073 ------------------------------------------------------------------- ALL OKEAN-O1 67 5.26 +/- 0.10 0.0077 +/- 0.0028 ALL OKEAN-O 103 5.42 +/- 0.09 0.0112 +/- 0.0025 ALL OKEAN 207 5.48 +/- 0.07 0.0107 +/- 0.0022 column 1 : name column 2 : international designation column 3 : number of observations column 4 : standard magnitude column 5 : phase coefficient Worldwide Satellite Launches has for the Okean-O satellites: "Bus of satellite is conical, with a base diameter of 1.4 metres and a height of 3 metres: two vanes of solar panels are deployed plus the radar and other equipment." There is a drawing, which shows an Okean-O satellite in SPACEFLIGHT Vol. 32, p. 239 (July 1990). The text says that the side-looking radar failed to deploy on Kosmos 1869. Mass of an Okean-O satellite is 1950 kg (Jonathan's Space Report #214). Rainer Kracht 1996 Jan 01 0412188960-0001@t-online.de R.Kracht@t-online.de