  The transition region between the North Equatorial Band (NEBn) and North
Tropical Zone (NTrZ) in Jupiter is home to convective storms, systems of
cyclones and anticyclones and atmospheric waves. A large anticyclone formed in
the year 2006 at planetographic latitude 19N and persists since then after a
complex dynamic history, being possibly the third longest-lived oval in the
planet after Jupiter's Great Red Spot and oval BA. This anticyclone has
experienced close interactions with other ovals, merging with another oval in
February 2013; it has also experienced color changes, from white to red
(September 2013). The oval survived the effects of the closely located North
Temperate Belt Disturbance, which occurred in October 2016 and fully covered
the oval, rendering it unobservable for a short time. When it became visible
again at its expected longitude from its previous longitudinal track, it
reappeared as a white large oval keeping this color and the same morphology
since 2017 at least until the onset of the new convective disturbance in
Jupiter's North Temperate Belt in August 2020. Here we describe the historic
evolution of the properties of this oval. We use JunoCam and Hubble Space
Telescope (HST) images to measure its size and its internal rotation. We also
used HST and PlanetCam-UPV/EHU multi-wavelength observations to characterize
its color changes and Junocam images to unveil its detailed structure. The
color and the altitude-opacity indices show that the oval is higher and has
redder clouds than its environment but has lower cloud tops than other large
ovals like the GRS, and it is less red than the GRS and oval BA. We show that
in spite of the dramatic environmental changes suffered by the oval during all
these years, its main characteristics are stable in time and therefore must be
related with the atmospheric dynamics below the observable cloud decks.
