Reference

The 27 nakshatras — lunar mansions.

A nakshatra is one of 27 lunar mansions, each 13°20′ of the ecliptic — the zodiac the panchang actually runs on. Every muhurat first matches the day's nakshatra to the activity through the seven-fold (Saptadha) classification. Below: each mansion's deity, symbol, Vimshottari lord, class and moon-sign rashi.

#NakshatraDeitySymbolLordClassRashi
1AshwiniThe Ashwini KumarasHorse's headKetuSwiftMesha
2BharaniYamaThe yoni (womb)VenusFierceMesha
3KrittikaAgniA razorSunMixedMesha, Vrishabha
4RohiniBrahma / PrajapatiA chariotMoonFixedVrishabha
5MrigashiraSomaDeer's headMarsTenderVrishabha, Mithuna
6ArdraRudraA teardropRahuSharpMithuna
7PunarvasuAditiBow and quiver of arrowsJupiterMovableMithuna, Karka
8PushyaBrihaspatiA cow's udderSaturnSwiftKarka
9AshleshaThe NagasA coiled serpentMercurySharpKarka
10MaghaThe PitrisA royal throneKetuFierceSimha
11Purva PhalguniBhagaFront legs of the bedVenusFierceSimha
12Uttara PhalguniAryamanBack legs of the bedSunFixedSimha, Kanya
13HastaSavitarAn open handMoonSwiftKanya
14ChitraVishvakarmanA bright jewelMarsTenderKanya, Tula
15SwatiVayuA young shoot swaying in windRahuMovableTula
16VishakhaIndra-AgniA triumphal gatewayJupiterMixedTula, Vrishchika
17AnuradhaMitraA lotusSaturnTenderVrishchika
18JyeshthaIndraAn earringMercurySharpVrishchika
19MulaNirritiTied rootsKetuSharpDhanu
20Purva AshadhaApasA winnowing basketVenusFierceDhanu
21Uttara AshadhaThe VishvadevasElephant tuskSunFixedDhanu, Makara
22ShravanaVishnuThree footprintsMoonMovableMakara
23DhanishtaThe VasusA drum (mridanga)MarsMovableMakara, Kumbha
24ShatabhishaVarunaAn empty circleRahuMovableKumbha
25Purva BhadrapadaAja EkapadaFront of the funeral cotJupiterFierceKumbha, Meena
26Uttara BhadrapadaAhir BudhnyaBack of the funeral cotSaturnFixedMeena
27RevatiPushanA fishMercuryTenderMeena

The Saptadha class is the first rule of electional astrology: fixed (sthira) stars for works meant to last, movable (chara) for journeys, tender (mridu) for marriages and the arts, swift (kshipra) for quick works, mixed (mishra) for routine, fierce (ugra) and sharp (tikshna) reserved for works of force. The classes are listed in Muhurta Chintamani and applied to every date on themuhurat lists.