I. Introduction

In the period 07–14 October 1961, operators at the Vektra Institute radiotelescope array conducted routine survey observations of the northern sky in the frequency range 1380–1450 MHz. The primary objective of these observations was calibration of the Institute's newly installed horn-reflector antenna system (Instrumentation Report V-61-011, Tikhonov et al.).

On the evening of 14 October 1961, at 21:47 Moscow Standard Time, monitoring equipment registered an anomalous emission source in the direction of the constellation Cygnus, approximately 2.3 degrees north of the galactic plane. The emission was centred at 1420.405 MHz — the hyperfine transition frequency of neutral hydrogen — and exhibited characteristics inconsistent with known natural phenomena in this frequency band.

This report documents the initial observations and presents a preliminary analysis of the signal's structural properties. The author notes that a full analysis was prepared separately and submitted to the Department of Applied Signals on 16.10.1961 and is not reproduced here.

II. Observational Conditions

V. Structural Analysis — Summary

The emission sequence, as recorded during the 47-second observation window before signal termination by external interference, presents the following structural features upon preliminary analysis:

(a) The signal is non-random. Autocorrelation analysis demonstrates a repeating sub-structure with a period of approximately 9.4 seconds. The probability of this periodicity arising from thermal noise or natural astrophysical processes is, in the author's estimation, negligible.

(b) The sub-structure contains what appears to be a numerical sequence. When the signal amplitude is sampled at regular intervals and the values mapped to a base-5 number system, the first eighteen terms of the resulting series are: 1, 1, 2, 3, 10, 13, 31, 44, 130, 224, 1004, 1233, 3342, 10130, 13022, 31202, 44224, 130001. The author recognises this immediately as a representation of the sequence of prime numbers in base 5. The probability of this arising by chance is so vanishingly small as to be a matter for the highest authority.

(c) Beyond the prime sequence, the signal contains a further encoded block of approximately 200 data units whose structure the author had not, at time of writing, decoded. Preliminary attempts suggest a nested encoding, possibly geometric in nature. The author requests additional time and the cooperation of the Department of Applied Signals to complete this analysis.

(d) The signal ceased at 21:48:47 MST. No recurrence was detected during subsequent monitoring over the following 72 hours, despite continuous observation by a full team.

VI. Conclusions

The author submits that the October 1961 Cygnus emission constitutes a signal of non-natural origin. The mathematical structure of the prime-number encoding, the precise centring on the hydrogen line frequency, and the apparent further encoding in the secondary block are not consistent with any known astrophysical emission mechanism. The author urges that this matter be treated with the greatest urgency and that all relevant resources of the Academy of Sciences and the appropriate state organs be directed toward further analysis.

The author is aware that this conclusion is extraordinary. He submits it in full knowledge of the consequences of being wrong, and in greater knowledge of the consequences of being right and saying nothing.