CERTIFICATE OF RE-ENTRYOrbital Register™ · by Orbital Radar™
Entry no.
1987-0538
Kosmos-1776 SS 4
ESO
Kosmos-1776 SS 4 (NORAD 17261) re-entered Earth’s atmosphere on 14 November 1987, after 1 year, 2 months in orbit.
Official dateIdentified from the historical record
NORAD number
17261
International designator
1986-067K
Object type
Spacecraft
Official listing
COSMOS 1776 DEBListed as a fragment
Country
USSR
Launched
3 Sep 1986Plesetsk Cosmodrome
Re-entered (UTC)
14 Nov 1987UTC calendar day
Time in orbit
1 year, 2 months437 days
How it ended
Re-entered (natural decay)
Latitude range
74.0°N to 74.0°SFinal inclination 74.0°
Mass
5 kg
Operator
PVO
Built by
Southern SDB
Bus
ESO
Programme
ESO
Where it came down
Latitude band its orbit allowedExact position not recorded
No position was recorded for this re-entry. Its final orbit, inclined at 74.0°, allowed a re-entry anywhere between 74.0°N and 74.0°S.
Life in orbit
1 year, 2 monthsKosmos-1776 SS 4’s lowest and highest points above Earth, week by week, from its tracking history.
From the same launch
1986-0671987-0530Kosmos-1776 SS 61987-0547Kosmos-1776 SS 81987-0552Kosmos-1776 SS 31987-0555Kosmos-1776 SS 91987-0569Kosmos-1776 SS 21987-0580Kosmos-1776 SS 51987-0591Kosmos-1776 SS 11987-0617Kosmos-1776 SS 71987-0620Kosmos-1776 SS 101988-0024Kosmos-1776 SS 111988-0067Kosmos-1776 SS 121988-0331Kosmos-1776 SS 15
Entered in the Orbital Register™, founding volume, September 2026.
Record version 1 · No corrections · orbitalradar.com/register/1987-0538
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.
Record version 1 · No corrections · orbitalradar.com/register/1987-0538
© 2026 Orbital Radar. Cite this entry by its number; the register itself may not be copied.