Its June 1980 launch was noted for triggering reports of a dolphin shaped UFO. The launch created so many UFO reports, they revealed the satellite's approximate orbital inclination (about 62.5 degrees). Some of the sightings may have been sunlight reflecting of fourth-stage exhaust contrails. NBC noted the sightings's appearance in the Weinstein list.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).