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I've found an almanac for earth perhelion up to 2100. 2019 perhelion occurred at roughly 5:00 January 3,2019. Thus the angle now of true anomaly is some extent past 0 degrees. And wolfram alpha is wrong by negative 180 degrees. By Wikipedia and other standard definitions of mean anomaly which have persisted sense Kepler's time.

While there does appear to be some deviation among sources, I find some in different time zone, on apparently from ny times reporting it occurred at a little after midnight January 3, 2019 which seems to correspond with a 5 am GMT time.

I've found an almanac for earth perhelion up to 2100. 2019 perhelion occurred at roughly 5:00 January 3,2019. Thus the angle now of true anomaly is some extent past 0 degrees. And wolfram alpha is wrong by negative 180 degrees. By Wikipedia and other standard definitions of mean anomaly which have persisted sense Kepler's time.

I've found an almanac for earth perhelion up to 2100. 2019 perhelion occurred at roughly 5:00 January 3,2019. Thus the angle now of true anomaly is some extent past 0 degrees. And wolfram alpha is wrong by negative 180 degrees. By Wikipedia and other standard definitions of mean anomaly which have persisted sense Kepler's time.

While there does appear to be some deviation among sources, I find some in different time zone, on apparently from ny times reporting it occurred at a little after midnight January 3, 2019 which seems to correspond with a 5 am GMT time.

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source | link

I've found an almanac for earth perhelion up to 2100. 2019 perhelion occurred at roughly 5:00 January 3,2019. Thus the angle now of true anomaly is some extent past 0 degrees. And wolfram alpha is wrong by negative 180 degrees. By Wikipedia and other standard definitions of mean anomaly which have persisted sense Kepler's time.