Fog bow

A fog bow, sometimes called a white rainbow, is a similar phenomenon to a rainbow; however, as its name suggests, it appears as a bow in fog rather than rain. Because of the very small size of water droplets that cause fog—smaller than 0.05 millimeters (0.0020 in)—the fog bow has only very weak colors, with a red outer edge and bluish inner edge. The colors fade due to being smeared out by the diffraction effect of the smaller droplets.

A fog bow seen in clouds, typically from an aircraft looking downwards, is called a cloud bow. Mariners sometimes call fog bows sea-dogs.

There are many potential explanations for sightings. We recommend eliminating the most common and mundane before jumping to less probable conclusions or you submit a report.

Resources

Object Trackers

Live flight tracking maps are available for monitoring airline traffic and trajectories in real-time or historically around the world.

FlightAware

Flightradar24

ADS-B Exchange

Marine Traffic

Space Launches

Planned launches occur regularly all over the globe. These tracks can help identify the potential missions or launches in your area.

SpaceLaunchSchedule.com

SpaceFlightNow.com

RocketLaunch.Live

Satellite Trackers

Satellite tracking can also be done in real-time with the aid of tracking maps. They are also helpful for tracking Starlink launches.

Heavens Above

Space Weather

There are a number of sites which track solar flares, magnetic storms, and other events which are helpful for eliminating explanations related to astronomic phenomena.

Spaceweather.com

Spaceweather.gov

Méprises Du Ciel

French site (with English translations) with resources and examples covering the most commonly observed phenomena and explanations for UFOs.