Greetings, Observed SL-08 R/B from recent CIS launch on p.m. pass over Melbourne Dec 26 22:44 (11:44 UTC). Measured 17.5 second photometric period, despite several problems. Patchy cloud cover conspired with batteries in my binoculars going flat during the pass, ruining an otherwise decent zenithal pass. Invisible maximum with fairly bright pronounced maximum of around mag +2. Could not see Cosmos 2361 (#25590) trailing. I assume the intrinsic brightness of this sat is fairly low. OIG still hasn't catalogued anything for #25591. Elsets as follows. COSMOS-2361 1 25590U 98076A 98360.20637259 .00008138 00000-0 88725-2 0 62 2 25590 82.9347 60.8187 0030064 270.8810 88.8895 13.72310210 180 SL-08 R/B 1 25592U 98076B 98359.54958136 .00004186 00000-0 44722-2 0 56 2 25592 82.9373 61.3099 0022529 268.0021 91.8600 13.73532602 99 L8r Jason Gibson Melbourne Australia 37.9803 S 145.0623 E 40m