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Sidney Coolidge's observations were published by the director of Harvard College Observatory George Phillips Bond (among others by Bond, Safford and Tuttle) in AN #1453 (1863). The 9 NGC objects, all found with the 15" f/18 Merz refractor installed in June 1847, are listed below (No. = number in Bond's list). "HN" stands for "Harvard Nebula", given in Pickering, E. C., Detection of Nebulae by Photography, Ann. Harv. Obs. 18, 113-117 (1890).
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NGC
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No.
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HN
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Date
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Type
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Con
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1251
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4
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24
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Jan. 25, 1860
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2 stars
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CET
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1312
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5
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23
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Dec. 16, 1859
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2 stars
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TAU
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3132
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13
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15
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Mar. 31, 1859
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not found
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SEX
|
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3229
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14
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16
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Mar. 31, 1859
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3 stars
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SEX
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4582
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15
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20
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May 3, 1859
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star (no neb.)
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VIR
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5200
|
16
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18
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Apr. 30, 1859
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2 stars
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VIR
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5310
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17
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19
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Apr. 30, 1859
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star
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VIR
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5404
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19
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17
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Apr. 29, 1859
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3 stars
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VIR
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7403
|
32
|
22
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Nov. 15, 1859
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star (no neb.)
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PSC
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Harvard Observatory with 15" Merz-Refractor
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