Frequently asked questions
Charts > Calculation
does my ascendant on astro.com differ from my ascendant calculated
by other astrologers?
Sometimes errors are made - the calculation could be wrong, perhaps the wrong place or time zone were used. Please check your data! With a given set of data, there can be no ambiguity. The result you get at Astrodienst is correct. Our calculations for astronomical facts are the most reliable in the whole "industry". For further reference, please see the "Full Documentation" of the Swiss Ephemeris.
the Ascendant in the Southern Hemisphere different from the one
in the Northern Hemisphere?
No. The point of the ecliptic rising in the east at any given moment and given location is a fact of nature. There is no room for opinion, it can only be computed right or wrong. We do it right.
Check the placement of the Sun in the chart, it must be sensibly placed relative to the horizon for the given time of day. For a day birth, the Sun must be above the horizon.
orbs do you use when calculating planetary aspects?
Our standard chart type uses the orbs listed at the bottom of the aspects page in our Introduction to Astrology.
Many of our chart types were designed especially for individual astrologers, and the aspects are calculated with orbs according to the preferences of these astrologers. Usually the chart types are named after these astrologers, as you can see in the Natal Chart Drawings in our online shop. This page also lists the orbs used for the calculation of aspects for Liz Greene's reports. Like most astrologers, she has her own style of work and, naturally, we respect this.
is my Part of Fortune at astro.com different from other calculations?
We use different formulae for Pars Fortunae for a day birth than for a night birth. You can change this rule with an option in the extended chart selection.
The day formula is: ASC + Moon - Sun
The night formula: ASC + Sun - Moon
Astrologers differ in their views about which formula to use for Pars Fortunae.
If you're interested in in-depth information, please read the article "The Lot or Part of Fortune" by Robert Hand in our "Understanding Astrology" section.
phase was the Moon in when I was born?
The phase of the Moon is represented by the angle between the Sun and the Moon in your birth chart, starting at the Sun, counter-clockwise. Zero degrees will be a new moon, 90 degrees a growing half moon, 180 degrees a full moon, etc. You can consult your chart drawing to measure the difference.
If you find this too difficult, please use the 'Lunar Phases Fertility Calendar' (under the group 'Astrodienst Special'). It gives the Phase of the Moon already computed, as a value between 0° and 359°.
time is the progressed chart calculated for?
The progressed charts are calculated for midnight Universal Time.