accuracy of distance

You say the correct Perihelion time is 4:37 UTC on 2013-01-02. Why? Where is source of this time?

I should not have told correct time. sorry for that. But I have seen that
from the following two sites.
http://aa.usno.navy.mil/data/docs/EarthSeasons.php

http://www.google.co.in/url?sa=t&rct=j&q=perihelion+time&source=web&cd=4&cad=rja&ved=0CEAQFjAD&url=http%3A%2F%2Fwww.slate.com%2Fblogs%2Fbad_astronomy%2F2013%2F01%2F02%2Fperihelion_earth_is_closest_to_the_sun_today.html&ei=6axhUeuHIIrorQezxYH4DA&usg=AFQjCNFUwga-GX-fOAzIB9EiLq8zbCq4zg&bvm=bv.44770516,d.bmk

On Sun, Apr 7, 2013 at 8:25 PM, Alexander Wolf <
<email address hidden>> wrote:

> Your question #226117 on Stellarium changed:
> https://answers.launchpad.net/stellarium/+question/226117
>
> Status: Open => Needs information
>
> Alexander Wolf requested more information:
> You say the correct Perihelion time is 4:37 UTC on 2013-01-02. Why?
> Where is source of this time?
>
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I thought all the distances are from the center of the earth

On Sun, Apr 7, 2013 at 8:31 PM, Matthew Gates <
<email address hidden>> wrote:

> Your question #226117 on Stellarium changed:
> https://answers.launchpad.net/stellarium/+question/226117
>
> Status: Needs information => Answered
>
> Matthew Gates proposed the following answer:
> The distance to the Sun also takes into account the observer's
> location on the Earth, so unless you have the observer set to one of
> the poles, the displayed Sun distance will be slightly less in the day
> time than the night time. At Perihelion, the Earth-Sun distance
> changes only slightly over a 24 hour period, so the change in position
> at latitudes towards the equator is quite significant and observed
> perihelion time.
>
> M
>
>
> On 7 April 2013 14:16, Debashis Saha
> <email address hidden> wrote:
> > New question #226117 on Stellarium:
> > https://answers.launchpad.net/stellarium/+question/226117
> >
> > I think the distance that it provides is not also very accurate also for
> the Sun. Because when I tried to find Perihelion time using minimum
> distance from the sun to the earth It shows the perihelion time at 12:42
> UTC on 2013-01-02. But the correct Perihelion time is 4:37 UTC on
> 2013-01-02.
> >
> > Am I really making a mistake or Stellarium does not show the distance it
> accurately?
> >
> > --
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Thanks Matthew Gates, that solved my question.