EMGJVIAT1QIE DE VÉNUS. 43 



« This morning aslwas observing ihe transit, I perceived a phenomcnon, which b) ils 

 motion appeared to move in a curve différent from any spots 1 bad ever before discovered 

 in die sun. An idea occured 10 me, that il was secondary planet to Venus : for it plainly 

 appeared to attend ils primary as Ibe centre of ils motion; and be lielp of my télescope 

 I could perceive it to make near the same transit as tlic planet Venus but nearcr the 

 ecliptic. End of tlic transit of Venus 51 minutes past eighl, and ibe end of tbe secondary 

 V) minutes past nine in the morning, apparent time? » 



J s«si. 



OBSERVATIONS DE ROEDKI/ER. 



Ces obsi rvations ont été publiées en 1882 par M. Scbjellerup, dans le Copernicus 

 (vol. II, p. 164), d'après les registres de l'Observatoire de Copenhague. Au texte même 

 des obsenations nous joignons les principales notes données par M. Schjellerup. 



« 1761. d. 28 Junii. In quadrante Venerem observans ' Rœdkiaer vidit albedinem 

 quandam, quae Venerem sequebatur. Distantiam inter banc et limbum Veneris superio- 

 rem invenit 0.66 -, et observavit 11" transitum inter banc et Venerem. Poetea tubo 17 

 eandem inlerum vidit, atque ex facie ejus, quae non adeo falcata erat ac Veneris, sed fere 

 dimidia faeie splendens, suspicatur Observator, se salellitem Veneris vidisse. Coeteri nos 

 eandem albedinem videre non potuimus, licet Venerem saepe observaverimus quadrante, 

 rota meridiana et tubo 17 pedum. 



» 1761. d. 30 Junii, A. M. Venerem observans Rœdkiaer eandem videbat albedinem, 

 quam antea diebus 28 ,u et 29"° Junii viderai. Distantiam ejus a Venere delerminabat 'L 

 circiler diametri Veneris. Erat islo die prope cornu superius Veneris in quadrante. Sed 

 isia albedo nondum cœteris nobis apparuit. 



■ 1761. d. 2 Julii. A. M. Per totam hanc nociem, et eliam per plurimas antécédentes 

 Boserup et Rœdkiaer Venerem expectarunt orientem spe Satellitem ejus detegendi, sed, 

 ctsi tubis 17 et 22 pedum usi fuerint, nibil tamen viderunt. 



-• 1761. d. 19 Julii. Statim post ortum Veneris, Rœdkiaer observabat lumen aliquod 

 débile figurée confusae et indistincts una cum Venere in tubo 17 pedum exislens, elsi 

 optime viderelur, etiam Venere in tubo non existente. Distantia hujus luminis a Venere 



1 No time givcn, altitude = 51"î)2'it". 

 ' As l 1 ' = lôO'.U, the distance was Hli". 



