16
Classic, Medieval, Vedic / Re: Planetary phases
« on: May 14, 2021, 06:51:11 PM »
My pleasure! I'm glad if I could help.
There are more specific rules but those would be probably difficult to implement in terms of coding.
I can give you guys a few examples just as a curiosity.
Venus is much brighter when she helically rises as a morning start and when she sets as an evening star compared to when she sets as a morning start and when she rises as an evening star. That is, Venus is much brighter at inferior conjunction than at superior conjunction, as such her heliacal rise and setting around this time happens earlier and later than when she is close to her superior conjunction (in terms of altitude difference between her and the sun).
Mercury is much much much brighter at superior conjunction than at the inferior one, which naturally reduces the difference between him and the sun in terms of altitude needed for him to be visible at superior conjunction.
The Moon is larger and brighter at perigee.
Mars is rather dim and small in terms of apparent diameter (as small as Uranos and Mercury) as he gets closer to the sun with a difference of a 60 degrees in longitude or so, so that's why he needs that rather large difference in altitude between him and the sun to be barely visible. Except once ever 15 or 17 years when he is at his perigee (or more precisely perihelion) and then he is slightly easier to observe as he rises in the morning or just before he sets in the evening.
Saturn's apparent diameter and apparent magnitude varies based on two factors, his closeness to the sun and earth and his rings. He will rise earlier from the sunlight and set later when he is around Gemini, that's when he is at his brightens. He will rise later and set earlier when he is around Virgo and across from her in Pisces. When he is around the end of Sagittarius he is between these two.
Uranos and Neptune's magnitude and apparent size varies less, but both are naturally easier to observe at their perihelion.
There are more specific rules but those would be probably difficult to implement in terms of coding.
I can give you guys a few examples just as a curiosity.
Venus is much brighter when she helically rises as a morning start and when she sets as an evening star compared to when she sets as a morning start and when she rises as an evening star. That is, Venus is much brighter at inferior conjunction than at superior conjunction, as such her heliacal rise and setting around this time happens earlier and later than when she is close to her superior conjunction (in terms of altitude difference between her and the sun).
Mercury is much much much brighter at superior conjunction than at the inferior one, which naturally reduces the difference between him and the sun in terms of altitude needed for him to be visible at superior conjunction.
The Moon is larger and brighter at perigee.
Mars is rather dim and small in terms of apparent diameter (as small as Uranos and Mercury) as he gets closer to the sun with a difference of a 60 degrees in longitude or so, so that's why he needs that rather large difference in altitude between him and the sun to be barely visible. Except once ever 15 or 17 years when he is at his perigee (or more precisely perihelion) and then he is slightly easier to observe as he rises in the morning or just before he sets in the evening.
Saturn's apparent diameter and apparent magnitude varies based on two factors, his closeness to the sun and earth and his rings. He will rise earlier from the sunlight and set later when he is around Gemini, that's when he is at his brightens. He will rise later and set earlier when he is around Virgo and across from her in Pisces. When he is around the end of Sagittarius he is between these two.
Uranos and Neptune's magnitude and apparent size varies less, but both are naturally easier to observe at their perihelion.