Ask the Rabbi: Should Kiddush Levana Be Done with a Minyan? | Rabbi Daniel Mann | Beit Midrash

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Question: We usually do Kiddush Levana outside shul on Motzaei Shabbat. Is it supposed to be done with a minyan or some other minimum number of people?

Answer: Kiddush Levana is mentioned by an early Amora (Sanhedrin 42a). Early sources do not connect it to a minyan or to tefilla. The Pri Chadash (226:1) tries to prove it does not require a minyan from the fact that the mishna (Megilla 23b) does not list it as one of the things that requires a minyan. This implies that Kiddush Levana, which does not appear in Tannaic sources, was instituted before that mishna was written. Some point out that the gemara’s language is singular. One way or another, there is insufficient source and/or logic to require a minyan, and the broad consensus is that one fulfills the mitzva even by doing it by himself.
That being said, many Acharonim (see Magen Avraham 426:6) have the minhag to try to have a minyan, applying to it a general rule in ritual matters: b’rov am hadrat melech (=brahm; the greater number of people who take part together, the greater the honor to Hashem). If that is the reason, it is clear why the mitzva counts without a minyan, as brahm is a classical hiddur (improvement to a mitzva) whose absence does not, as a rule, disqualify mitzvot. There is an opinion that because it is a beracha of shevach (praise), and it is seen as greeting the Divine Presence, a minyan is particularly important (Teshuvot V’hanhagot I:205). (The idea of it being a birkat hashevach is not very convincing, as the gemara sounds like it resembles other berachot in which we praise Hashem for natural phenomena (e.g., on thunder, seeing great bodies of water), which are not as a group.) The way the practice has developed, there is another gain in having a minyan, since we recite Kaddish after it (see Kaf Hachayim, Orach Chayim 426:13).
There is a question about what is needed to attain brahm status. There is an opinion in the gemara (Gittin 46a) that three people constitute rabim (many or public) (the other opinion says ten), and the Gra (to OC 422:2) accepts it and applies it to contexts similar to ours (see Rama, OC 422:2). Therefore, the Be’ur Halacha (to OC 426:2, based on Chayei Adam 68:11) says that the difference between doing Kiddush Levana with ten or three is not major. It is likely that the point is that is not mainly a question of what the minimum is for brahm. Rather there are levels of brahm and of hiddur.
Regarding under three, there is likely an advantage doing Kiddush Levana with another person. Rav Feinstein (Igrot Moshe, OC I, 146) sees precedent in the gemara that the presence of a second person shows one did not chance upon the moon but intentionally encountered it to show appreciation. Also, the Levush (626:1) points out that in order to fulfill the custom of saying "Shalom aleichem," one needs at least one other person.

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590 - Ask the Rabbi: Should Kiddush Levana Be Done with a Minyan?

591 - Ask the Rabbi: Should Kiddush Levana Be Done with a Minyan?

Level of value is relevant regarding competing values. One such value is z’rizin makdimin l’mitzvot (it is best to do mitzvot as early as possible), which generally is more important than brahm (see Rosh Hashana 32b). A third value is specific to Kiddush Levana – it is preferable to do Kiddush Levana on Motzaei Shabbat, mainly because we are usually better dressed then (Shulchan Aruch, OC 426:2). The minhag is clearly to wait for Motzaei Shabbat even though one could have done it earlier. However, some say that if earlier there is a chance to do it with a minyan, whereas he will not have one on Motzaei Shabbat, the two advantages of doing it earlier win out in that case (see Sha’ar Hatziyun 426:20). The Be’ur Halacha (ibid.) says that while it is worthwhile to wait several days (when there is not concern of cloud cover until the middle of the month) to do it with a minyan, if earlier there is a chance to do it with three, the net gain does not necessarily justify the wait.
While we have not exhausted all the permutations and opinions, we have seen the logic and extent of the preference of having several people together for Kiddush Levana.