v< i‘^ e e/V«-»us, Qt/fjvV -vDantzicfc;
As. Hcvclius.n. 154. f. 4>?-
XCVIII.
Mercury obser-VeJ ia tbe Sua,1^90. at Ku-rembtrg; byM. Jo. Phil.Wurtzelbaur.
». f. 483.
(426 )
Mean time I perceived in the Motion of the dark Spots so great a Variation,'that it cannot be aseribed to any Reason in Opticks.
M,\y 10. and 13. Before Sun-RJsng, I saw stili the Brigbt part near theCenter Northv/ard
Lastly, Jun: 5. and 6. Before the Rising os the Suti, I siw the ftme be*twecn the Northern Horn and the Center os this Planet, and I noted thetarne Irregulär Variation in the Obscure Spots. But when Venus began to besarther removed srom the Enrth, it was niore difficult to obfervc thde Phx-nemena.
It is very difficult to determine any thing os the Motion of theso SpotsYet this 1 can fay ( suppofing that this Bright part of Venus, which I haveobsorv’d, efpecially this Year 1667, haffi ahvays been the fame ) that in Icssthan one Day it ablolves its Motion, whether of Revolution or Libration, soas in near 23 Hours it returns to the tarne Scituution in this Planet, whichyet happens not without some Irregularity.
XCV 1 I. An. 1683. ylug.4.. hora sere 3 . >n. Venus a Stella Fixa 3. Magnitud.a Ventre teil. Pollucis non nili i6 ; . removebatur Austrum versos, id quod exMicrometrq accurate competi.
Tctnp. Ho-rni, Ofcil.
Obfcrvaticnes.
Tempora
snpputata.
h. ' "
Die 30. OSob. p. m. A. 1690.
h. ' '!
6 31 00
Culminat Os Pegasi - ■— - ■——
6 x8 45
9 00 00
Cltlm. Cap. Atnlromed.c —— —-
8 fz 17
9 4 00
Culm. Jupiter -- —>— -
w
Die 3 1. OcioFl. m.
OO
J-J
0
0
0
Sol e nubibus emersit, Mercurius m disoo ejus fu-
perne in Tab. observatoria, ä Verticali ad dex-
tram (revera ad Laevam ) distans plus quam
Dim. Dig. a Limbo exiturus apparuit.
8 36 00
Mercurius postquam Undulanti Limbo
Solis ad
Min. Temporis adhaeserat, exiit ad 14 0 a Ze-
vitb Septentrionem versos.
O /
h. 1 "
8 49 00
Altitudo Solis . . . —--
10 5
8 38 38
8 59 45
-—-- --
11 10
8 47 48
9 7 IO
17. IO
8 5 -6 24
9 50 00
16 7.8
9 7
11 1 30
XI 31
10 56 32
Ratio Diametrorum Solis 6c Nuclei Mercurii, dum Lucido Solis Disoo im-morabatur, quantum per auram haud fatis defaecatam conjici poterat, erat ut
100 0