### kinematic distance

(distance to objects within Milky Way based on radial velocity)

**Kinematic distance** is a distance-determination
to an object within the Milky Way
based upon a map of the general movements (orbits) of objects within
the galaxy. In any given direction, the typical radial velocity of
an object varies with distance due to the object's orbital path around
the galactic center, and the general relation between typical orbits and
distance from the center is known.
Since Doppler shifts of
recognizable spectral lines gives very good information on
radial velocities, this is very useful for determining
the distance to clouds, which do not offer the clues to distance
offered by stars (stellar distance determination).

The **Kinematic distance ambiguity** is a **distance ambiguity**
in that in some directions,
there are two different distances at which the expected
radial velocity is the same, thus two different distances are
consistent with the radial velocity. For clouds, finding methods
based on observation to resolve this ambiguity is of interest.

(*measure,distance*)
http://inspirehep.net/record/819525/plots?ln=en

http://bessel.vlbi-astrometry.org/revised_kd_2014

https://arxiv.org/abs/0905.0723

https://arxiv.org/abs/1802.04203

**Referenced by:**

degeneracy

rotation curve

index