Chinese Astronomy

Purple Forbidden Enclosure, Ziwei Yuan, is the boundary of the stars always visible in northern sky at night from a particular location. The following is angular measurements of stars of Purple Forbidden Enclosure recorded in Qing official astronomical records, 1744 AD.


Star map from Dunhuang


Asterism (Number of stars)
Star name
House
Longitudinally
angular
distance
Angular
distance
from
Yellow Path
to
North
/
South
Northern pole (5)
 

Crown prince Wu 1755'28" 7513'01" N

Emperor Wu 0940'08" 7258'26" N

Son of concubine Wu 0446'09" 7125'20" N

Imperial concubine Wei 2908'24" 7029'38" N

Celestial pivot
(Northern pole)
Wei 1309'25" 6702'51" N
Four advisors (4)
 

First Wei 0500'18" 6451'15" N

Second Wei 0801'25" 6350'25" N

Third Wei 1136'55" 6251'15" N

Fourth Wei 1203'07" 6540'08" N
Curved array (6)
 

First Shen 2459'43" 6604'10" N

Second Shen 2734'30" 6954'10" N

Third Wei 0540'25" 7353'08" N

Fourth Wei 2347'25" 7506'50" N

Fifth Shen 1756'45" 6510'10" N

Sixth Shen 1212'45" 6730'40" N

Great emperor of heaven Shen 1709'15" 6801'41" N
Celestial pillar (5)
 

First Shen 1051'20" 7133'46" N

Second You 2633'54" 7235'20" N

Third You 2608'29" 7636'10" N

Fourth Shen 0752'25" 7900'06" N

Fifth Shen 2629'05" 7631'50" N
Maids-in-waiting (4)
 

First You 2129'10" 8040'03" N

Second Shen 0912'02" 8024'25" N

Third Wei 0950'40" 8158'33" N

Fourth Shen 1301'57" 8331'20" N

Female protocol Wei 0005'58" 8430'10" N

Official of royal archives Shen 0741'28" 8450'40" N
Royal secretary (5)
 

First Wu 2244'50" 8650'45" N

Second Si 0133'52" 8100'05" N

Third Chen 0030'58" 8137'10" N

Fourth Wu 2306'00" 8030'00" N

Fifth Chen 0052'47" 8318'40" N
Celestial bed (6)
 

First Wu 2204'56" 6912'05" N

Second Si 0413'16" 7404'27" N

Third Si 2554'30" 7523'23" N

Fourth Si 1504'40" 7855'40" N

Fifth Si 0655'30" 7203'18" N

Sixth Wu 1702'33" 7231'44" N
Chief judge (2)
 

First Wei 2552'38 6412'05" N

Second Wei 2753'38" 6412'05 N
Hidden virtue (2)
 

First Wei 2254'47" 5811'13" N

Second Wei 2518'28" 5714'30" N
Six JIA (6)
 

First Wei 0006'40" 5618'03" N

Second Wei 0203'45" 5347'50" N

Third Wei 0525'25" 5706'33" N

Fourth Wei 0201'25" 5923'07" N

Fifth Shen 2127'55" 5753'50" N

Sixth Shen 2316'40" 5550'40" N
Interior seats of five emperors (5)
 

First Shen 1203'32" 5747'27" N

Second Shen 0534'07" 5806'56" N

Third Shen 1243'10" 6024'23" N

Fourth Shen 1148'34" 5605'52" N

Fifth Shen 1817'00" 5757'40" N
Canopy of the emperor (7)
 

First You 2811'30" 5524'40" N

Second You 2808'27" 5558'51" N

Third You 2430'17" 5610'13" N

Fourth You 2015'36" 5413'40" N

Fifth You 2124'40" 5249'50" N

Sixth You 2319'53" 5150'12" N

Seventh You 2536'08" 5138'50" N
Canopy support (9)
 

First Shen 1101'56" 4933'40" N

Second Shen 0847'48" 5329'18" N

Third Shen 0423'12" 5711'10" N

Fourth Shen 0236'18" 5556'45" N

Fifth Shen 0000'53" 5421'04" N

Sixth You 2945'43" 5324'15" N

Seventh You 2823'26" 5312'07" N

Eighth You 2557'04" 5352'19" N

Ninth You 2413'44" 5411'20" N
Left wall (8)
 

Left pivot Chen 0118'05" 7104'04" N

First premier Chen 1309'12" 7426'00" N

Second premier Chen 1039'00" 7826'30" N

First minister Si 2924'05" 8447'00" N

Second minister You 1653'05" 8311'30" N

First imperial guard You 1723'08" 7518'45" N

Second imperial guard You 1959'46" 6533'00" N

Second prime minister You 2559'30" 5941'10" N
Right wall (7)
 

Right pivot Si 0347'43" 6620'52" N

Second chief judge Wu 1236'40" 6143'20" N

First minister Wu 0643'30" 5713'03" N

Second minister Wei 2246'52" 5113'40" N

First imperial guard Wei 0334'30" 4559'46" N

Second imperial guard Shen 1719'42" 4320'28" N

First prime minister Shen 0417'14" 4510'56" N

Heavenly first one Si 0116'05" 6521'38" N

Great first one Wu 2536'00" 6413'00" N
Inner kitchen (2)
 

First Wu 1917'02" 6104'10" N

Second Wu 2230'00" 6053'45" N
Northern dipper (7)
 

Celestial pivot Wu 1135'00" 4940'05" N

Celestial rotating jade Wu 1549'13" 4506'15" N

Celestial shining pearl Wu 2651'38" 4707'20" N

Celestial balance Wu 2725'55" 5139'40" N

Jade sighting-tube Si 0518'05" 5419'35" N

Opener of heat Si 1203'23" 5622'47" N

Twinkling brilliance Si 2318'40" 5424'30" N

Assistant Si 1331'50" 5740'40" N
Celestial spear (3)
 

First Si 2621'39" 5854'44" N

Second Si 2731'00" 5851'50" N

Third Si 2859'00" 6010'04" N

Sombre lance Shen 0322'58" 5439'20" N
Three excellencies (3)
 

First Si 2348'02" 5051'40" N

Second Si 2046'00" 5252'00" N

Third Si 1639'02" 5147'06" N

Prime minister Si 0413'28" 4806'27" N
Judge for nobility (4)
 

First Wu 1446'08" 4917'04" N

Second Wu 2044'26" 4700'54" N

Third Wu 2437'57" 4938'40" N

Fourth Wu 1929'31" 5310'17" N

Guard of the Sun Si 0005'16" 4131'58" N

Royals Wu 2513'58" 3531'30" N
Celestial prison (6)
 

First Wu 2255'40" 3302'36" N

Second Si 0200'28" 3241'32" N

Third Wu 2528'55" 3102'12" N

Fourth Si 0006'20" 3611'48" N

Fifth Wu 2623'16" 3004'26" N

Sixth Wu 2822'44" 3546'22" N
Eunuch (4)
 

First Wu 2251'10" 2355'27" N

Second Wu 2338'10" 2123'45" N

Third Wu 2718'43" 2102'47" N

Fourth Wu 2715'04" 2455'30" N
Administrative centre (6)
 

First Wu 0004'13" 4609'22" N

Second Wu 0241'49" 4239'06" N

Third Wu 0545'17" 3814'10" N

Fourth Wu 0345'22" 3456'22" N

Fifth Wei 2932'50" 3325'56" N

Sixth Wei 2943'03" 3604'25" N
Inner steps (6)
 

First Wei 1925'32 4012'34" N

Second Wei 2541'18" 4248'00" N

Third Wei 2123'49" 4455'03" N

Fourth Wei 2713'10" 4507'04" N

Fifth Wei 2218'52" 4219'35" N

Sixth Wei 2822'40" 3835'08" N
Three top instructors (3)
 

First Wei 2024'10" 4754'45" N

Second Wei 2649'07" 5152'17" N

Third Wei 2138' 4728'50" N
Eight kinds of crops (8)
 

First Shen 2621'23" 3049'02" N

Second Shen 2535'27" 3230'50" N

Third Shen 2412'23" 3239'57" N

Fourth Shen 1933'48" 3929'29" N

Fifth Shen 1543'53" 3051'06" N

Sixth Shen 1711'51" 2924'50" N

Seventh Shen 1755'19" 3553'33" N

Eighth Shen 2539'31" 3624'40" N
Guest house (9)
 

First You 0916'30" 5900'53" N

Second You 1332'47" 5459'48" N

Third You 1540'06" 5139'20" N

Fourth You 1631'12" 5113'50" N

Fifth You 2606'24" 4853'06" N

Sixth You 2855'21" 4231'17" N

Seventh Shen 0312'55" 3932'23" N

Eighth Shen 0241'58" 3826'43" N

Ninth Shen 0127'36" 3510'47" N
Celestial kitchen (6)
 

First Xu 1351'03" 8252'50" N

Second Xu 2754'35" 8055'14" N

Third Xu 2916'40" 7927'40" N

Fourth Xu 1658'43" 7807'40" N

Fifth Xu 0252'18" 7728'10" N

Sixth Xu 0007'35 8148'30" N
Celestial flail (5)
 

First Yin 2114'20" 8019'40" N

Second Yin 0651'33" 7811'18" N

Third Yin 0830'46" 7519'55" N

Fourth Yin 2427'48" 7458'20" N

Fifth Yin 1616'06" 6918'49" N