Adjust test to check less strictly near UTC JD=0
Adjust test to check less strictly near UTC JD=0

pllim/astropy,lpsinger/astropy,lpsinger/astropy,mhvk/astropy,larrybradley/astropy,lpsinger/astropy,astropy/astropy,pllim/astropy,mhvk/astropy,astropy/astropy,pllim/astropy,mhvk/astropy,larrybradley/astropy,pllim/astropy,astropy/astropy,larrybradley/astropy,larrybradley/astropy,astropy/astropy,lpsinger/astropy,mhvk/astropy,astropy/astropy,larrybradley/astropy,mhvk/astropy,lpsinger/astropy,pllim/astropy