Time Earth reached its Perihelion

[Philosophaie]

On 1-4-12 the Earth reached its Perihelion.

It is the closest Earth's radius to the Sun in its ellipse.

I have a few sources that have conflicting accounts about the TIME this happened.

Could someone give me a definitive source to clarify my discrepancies of clock differences.

One said 1-4-12 @10:59PM EST, other varied from 0:00Mid to 6:00AM that same day.

 

[D H]

January 5, 2012 at 00:33 (TT).

 

[Philosophaie]

Do you mean January 5, 2012 @00:00:33TT which translate to Ephemeris Time Jan 5, 2012 @00:00:0.816ET?

 

[D H]

No, I meant 33 minutes after midnight (TT), just as I typed it. That is the time at which Earth-Sun range rate went from negative to positive per JPL Horizons. I wouldn't put too much stock in timing this down to the second.

 

[Philosophaie]

From the Barycenter Earth-Moon model in JPL Horizons with @sun as the center. The smallest Helio range "r" and the Helio rate changing positive has a date of January 4,2012 @3:00(TT). Why is it different to your perihelion of January 5, 2012 at 00:33 (TT)?

 

[D H]

From the Barycenter Earth-Moon model in JPL Horizons with @sun as the center. The smallest Helio range "r" and the Helio rate changing positive has a date of January 4,2012 @3:00(TT). Why is it different to your perihelion of January 5, 2012 at 00:33 (TT)?

You used the Earth-Moon barycenter. I used the Earth. Earth perihelion passage is the time at which the Earth is closest to the Sun, not the Earth-Moon barycenter.