Issue 87

Russia: Kosmos-2571 Releases Sub-Satellite

13 Dec: As noted previously, Russia launched Kosmos-2570 (58148) on 27 Oct 2023. This spacecraft is the Lotos-S1 No7 electronic intelligence satellite, and as predicted in open press, there was a secondary payload (Kosmos-2571) released 30 Oct 2023 after Kosmos-2570 circularized its orbit. Later Kosmos-2571 (58172)…

13 Dec: As noted previously, Russia launched Kosmos-2570 (58148) on 27 Oct 2023. This spacecraft is the Lotos-S1 No7 electronic intelligence satellite, and as predicted in open press, there was a secondary payload (Kosmos-2571) released 30 Oct 2023 after Kosmos-2570 circularized its orbit. Later Kosmos-2571 (58172) released “Object D” (58428). There is still confusion over naming assignment. Kosmos-2571 has not maneuvered, while “Object D” appears to have increased its altitude 0.5 km on 6-7 December.

– Kosmos-2570 releasing a sub-satellite is similar to the activity of Kosmos-2565, launched 30 Nov 2022, and also believed to be an Lostos-S1. Kosmos-2565 also released a daughter satellite (Kosmos-2566) on 2 Dec, followed by Kosmos-2566 releasing its own baby satellite on 24 Dec 2022 (Christmas Eve).

– LeoLabs released a report on Kosmos-2570’s recent activity. Their analysis says Kosmos-2571 (also known as Object C) released Object D shortly after Kosmos-2570 maneuvered, resulting in the US Space Force temporarily losing track of the object.

– Per LEO Labs: “We were able to track both objects quickly and send frequent updates. On November 24, we were the first to detect, catalog, and deliver alerts to the Joint Task Force – Space Defense (JCO) on a secondary object released by sub-satellite Object C (Kosmos-2571) before the public catalog was able to respond. This prompted urgent action by all parties to track and identify the new object, now called Object D.”

– Also Per LEO Labs: “Then on Dec. 6, Kosmos-2570’s granddaughter (Object D) began another maneuver, bringing it within less than 1 kilometer of its mother (Kosmos-2571) — extremely close and well beyond what is normally considered safe for orbital operations.” “That move happened in ‘favorable lighting conditions,’ suggesting that the granddaughter (Object D) ‘has an electro-optical (EO) sensor payload.’”

Kosmos-2570 & Object D

Lotos-S1 Model w/ Adapter for Secondary Satellite (NASASpaceflight)

Object D .5km SMA Change 6 Dec (Celestrak)