Spirits and stars · Auspicious
An auspicious star read from the month. It is taken as a mild, generous nature and an ability to dissolve trouble. The classics called it the virtue of the month.
Look up stems and branches from the month branch: the first month sees Ding, the second Shen, the third Ren, the fourth Xin, the fifth Hai, the sixth Jia, the seventh Gui, the eighth Yin, the ninth Bing, the tenth Yi, the eleventh Si, the twelfth Geng.
Source: Xie Ji Bian Fang Shu and San Ming Tong Hui
In practice it reads as leaving room for others and finding people willing to work with you: getting things done through credibility and proportion rather than pushing hard.
Used as a chart hint only (it does not enter any score). The rule is implemented from the fixed classical table and asserted by its own guard (check-shensha).
Rule of thumb: these markers are read from fixed classical tables, and the scores and advice come from a separate model. Both are laid out on the site, and neither is a claim about what will happen.
What is the difference from Yue De?
The lookup is different: Heavenly Virtue is read by month from a fixed stem or branch, Yue De from the three-harmony group. Traditionally the two are read together.
Is it bad not to have it?
No. These are fixed-table markers; judgement still rests on the overall structure of the five phases and the pattern.