---
title: "Sigma — check charity number SC054512 | CharityCompare"
description: "Is Sigma a legitimate UK charity? Check charity number SC054512. the advancement of the arts, heritage, culture or science charity based in Moray. Official OSCR record, key facts and how to claim the profile — on CharityCompare."
source: https://www.charitycompare.org.uk/charity/sigma
retrieved: 2026-08-24T15:58:57.791Z
license: "Charity data © Crown copyright, Open Government Licence v3.0"
---

Quick answer

Sigma is a registered charity (number SC054512) on the Office of the Scottish Charity Regulator (OSCR) register, so it is a legitimate, regulator-overseen organisation. It is registered for: the advancement of the arts, heritage, culture or science. CharityCompare shows its official register record below; a Clarity Score is added automatically once detailed filing history is available.

## What are the key facts about Sigma?

Registered charity number

SC054512

Status

Registered (active)

Charity type

Unincorporated association

Location

Moray

Website

[www.sigma-astro.co.uk](http://www.sigma-astro.co.uk/)

## What does Sigma do?

The overarching purpose of SIGMA is the advancement of science. 2.2. Specifically, SIGMA exists to promote the awareness of, interest in and enjoyment of astronomy through a variety of methods. 2.3. SIGMA seeks to achieve its aims within a friendly and stimulating environment through a varied programme of meetings, and activities. Additionally, this may include talks, exhibitions, trips to places of astronomical interest, expeditions, observational sessions, technical workshops, promotional and social events, hosting educational, practical and social activities in the local area that are…

## What causes is Sigma registered for?

the advancement of the arts, heritage, culture or science

## Why is there no Clarity Score for Sigma yet?

The Clarity Score is computed from full financial filing history. Sigma is on the official
register but outside the detailed-filing group we currently score (or awaiting its first filings), so
we show its official register record instead of a rating. Its score appears automatically once enough
filing data exists — never by payment.
[How scoring works](https://www.charitycompare.org.uk/methodology)

## Is this your charity?

Claim this profile free to add your own description, correct details, or respond publicly.
Optional [partner plans](https://www.charitycompare.org.uk/partners)
add your logo, photos, verified badge and supporter features — claiming itself is always free and never changes any score.

[Claim this profile — free](https://www.charitycompare.org.uk/claim?charity=sigma&type=claim)
[Visit charity website](http://www.sigma-astro.co.uk/)

## Frequently asked questions

Is Sigma a legitimate charity?

Yes. Sigma is a legitimate registered charity (charity number SC054512) regulated by the Office of the Scottish Charity Regulator (OSCR). You can verify it on the official register. Registration proves status — it is not a Clarity Score or an impact rating.

What is Sigma's charity number?

Sigma's charity number is SC054512. Check that number on the OSCR register or this CharityCompare profile before you donate.

How do I check charity number SC054512?

Search SC054512 on the Office of the Scottish Charity Regulator (OSCR) register or on CharityCompare. Confirm the registered name matches the organisation asking for money — scammers sometimes reuse real charity numbers.

What does Sigma do?

The overarching purpose of SIGMA is the advancement of science. 2.2. Specifically, SIGMA exists to promote the awareness of, interest in and enjoyment of astronomy through a variety of methods. 2.3. SIGMA seeks to achieve its aims within a friendly and stimulating environment through a varied programme of meetings, and activities. Additionally, this may include talks, exhibitions, trips to places of astronomical interest, expeditions, observational sessions, technical workshops, promotional and social events, hosting educational, practical and social activities in the local area that are…

Does Sigma have reviews and complaints?

CharityCompare does not host public user reviews for Sigma. This basic profile confirms registration and register facts. Rated charities also show a filing-based Clarity Score. For formal complaints, contact the Office of the Scottish Charity Regulator (OSCR) or the Fundraising Regulator as appropriate.

How can I donate to Sigma?

Sigma's website is http://www.sigma-astro.co.uk — donate there directly so the charity receives the full amount. CharityCompare never takes a commission on donations.

Source: Office of the Scottish Charity Regulator (OSCR) register extract dated 2026-08-07,
used under the
[Open Government Licence v3.0](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/).
Always verify current details on the
[official register entry](https://www.oscr.org.uk/about-charities/search-the-register/charity-details?number=SC054512).