<p><a href="http://www.cosmos.esa.int/web/gaia/dr1">Gaia data release 1</a> was announced in September 2016. It has parallaxes for 2 million stars previously observed by the Hipparcos mission, a small fraction of the 1.1 billion positions recorded so far. Future releases will of course have more data and smaller errors.</p>

<p>Gaia has ~600 light curves for Cepheids but probably not parallaxes for most of those.
<a href="https://arxiv.org/abs/1609.05175">Casertano et al. 2016</a> checked Gaia parallax data of some Cepheids against expected values from ground-based photometry.</p>

CC BY-SA 3.0
2016-10-29T18:01:17.293Z
2016-10-29T18:01:17.293Z
Mike G
<p>When the Gaia parallax data (especially for Cepheid stars) become accessible to public? If it is already released for some parts, where can I find it?</p>

<parallax><gaia>
Gaia Parallax data
7_G.S.N
# Gaia Parallax data

(Asked by: username_0 on 2016-10-29)

When the Gaia parallax data (especially for Cepheid stars) become accessible to public? If it is already released for some parts, where can I find it?

**Tags:** parallax, gaia

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## 1 answers

### Answer by username_1 on 2016-10-29. Score: 6

[Gaia data release 1](http://www.cosmos.esa.int/web/gaia/dr1) was announced in September 2016. It has parallaxes for 2 million stars previously observed by the Hipparcos mission, a small fraction of the 1.1 billion positions recorded so far. Future releases will of course have more data and smaller errors.

Gaia has ~600 light curves for Cepheids but probably not parallaxes for most of those.
[Casertano et al. 2016](https://arxiv.org/abs/1609.05175) checked Gaia parallax data of some Cepheids against expected values from ground-based photometry.


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