Its seems to exist as an incorrect shoreline in the freely available NOAA GSHHS Shorelines data[1] which digitalglobe[2] uses to crop low-resolution satellite images to be replaced with high-resolution land area imagery, with nothing available for the location this results in the black spot.

Landsat[3] never showed anything there, especially at this size. Earliest depiction[4] I found in the short time via oldmapsonline.org dates back to 1881 While this otherwise well explored map[5] of 1862 does show nothing in place.

GeoGarage[6] pretty much says the same.

This only shows how slowly low priority public datasets are updated/maintained since the french maritime authorities SHOM don't have anything in their official charts of the area.

[1]http://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/version2....

[2]https://browse.digitalglobe.com/imagefinder/navigator.do?nav...

[3]http://landsatlook.usgs.gov/ sorry no direct link possible, just got to the location zoom in and search for available imagery.

[4]http://www.davidrumsey.com/luna/servlet/view/search?q=List_N...

[5]http://www.davidrumsey.com/luna/servlet/view/search?q=List_N...

[6]http://blog.geogarage.com/2012/11/south-pacific-sandy-island...