Choose the table before assigning a ruler
Egyptian and Ptolemaic bounds are distinct schemes. The order of rulers and interval lengths can differ. ‘Venus is in a Mercury bound’ is therefore a statement about both a coordinate and a selected table, not an intrinsic astronomical label.
The Sun and Moon can occupy a bound, but they are not among the five bound rulers in these familiar schemes. Distinguish the planet being located from the planet assigned to govern its interval.
Boundary notation can create a one-degree mistake
Tables sometimes print only the ending number of each interval. Before reading such a table, check whether its entries are upper limits or ordinal degree names. The interval convention must be explicit; do not assume that a printed 6 means the whole position from 6°00′ to 6°59′ belongs to the preceding ruler.
Use the full precision available near a boundary. Rounding a position from 5°59′ to 6° changes the apparent interval. Keep the original coordinate in your notes, together with the table name and zodiac.
What Sky Degrees supplies
The birth chart provides the zodiacal degree needed for a lookup. It does not currently compute a bounds table, score bound dignity or certify a particular traditional interpretation. A degrees page should not pretend those calculations are already in the product.
Bounds can be one component of a traditional dignity assessment. They do not erase the sign ruler, house, aspects or other conditions, and a numerical dignity score is itself a chosen interpretive method rather than a scientific measurement of a person.
A CONCRETE EXAMPLE
Worked interval example, not a historical bounds table
Suppose a teaching table defines interval A as 0° ≤ x < 6° and interval B as 6° ≤ x < 12°. A position at 5°59′ belongs to A; exactly 6°00′ belongs to B. These made-up intervals illustrate endpoint notation only and assign no historical planetary rulers.
For an actual traditional lookup, replace the teaching intervals with a verified, named table. Record the sign, degree, table and resulting ruler so another reader can reproduce it.
Check the coordinate.
Use the longitude converter to check signs and intervals, or calculate your chart to find actual placements.
Open the degree converterCommon questions
Can I use a decan table to find a bound?
No. The divisions and ruler schemes differ. A decan table cannot substitute for a bounds table.
Does changing the house system change the bound?
Not if the zodiacal longitude stays the same. Changing the zodiac or ayanamsa can change the coordinate used in the lookup.
Calculation & interpretation
New personal calculations use Skyfield with JPL DE440 data and the site’s documented house and zodiac rules. The preserved Greenwich teaching chart has its own historical source label. Worked arithmetic and geometry examples are labelled separately. Astrological meanings are symbolic conventions, not established scientific predictions.
Birth time and place affect angles and houses. Unsupported or ambiguous inputs return an error rather than an invented chart. Personal results stay in browser state and do not create public result URLs.
Read the calculation settings guide