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Asteroid

Hygiea

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10 Hygiea (A849 GA)

Where is it now

Distance from Sun
3.164 AU
True anomaly
261.67°
Distance from Earth
3.747 AU
As of
11 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth Hygiea — 3.164 AU from the Sun Hygiea
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Hygiea is 3.747 AU from Earth today (31.2 light-minutes).

In the sky

Right ascension
10h 09m 09s
Declination
+09° 27′ 12″
Constellation
Leo
Distance from Earth
3.74 AU
Elongation from the Sun
48.26° — near the Sun — look low at dusk or dawn

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
3.151 AU
Eccentricity
0.1067
Inclination
3.83°
Orbital period
5.59 years
Perihelion
2.815 AU
Aphelion
3.487 AU
Longitude of ascending node
283.12°
Argument of periapsis
312.42°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 702.5 LD
1.8051 AU
Tisserand (Jupiter)
3.195

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
5,207
Data arc
176.9 years
First observed
26 May 1849
Last observed
7 April 2026
Residual RMS
0.48 ″
Solution · Otto Matic
16 June 2026

Physical properties

Mean radius
204 km
Rotation period
13.83 hours
GM
7 km³/s²

Visual & observation

Geometric albedo
0.072
Absolute magnitude (H)
5.65
Colour index (B–V)
0.7
Spectral type (SMASS)
C
Spectral type (Tholen)
C
Colour index (U–B)
0.35

Discovery & classification

Discovered by
de Gasparis, A.
Discovery date
12 April 1849
Discovery site
Naples

Also known as 10 · A849 GA · A900 GA

Main-Belt Asteroid Named

Close approaches 9 on record

When (UTC) Body Distance Lunar distances Relative speed
2036-11-02 19:28:00 Juptr 1.6344 AU 636.1 LD 2.2 km/s
2047-03-14 04:16:00 Juptr 1.5969 AU 621.5 LD 1.8 km/s
2057-07-18 06:27:00 Juptr 1.924 AU 748.8 LD 3.4 km/s
2120-12-11 11:09:00 Juptr 1.8817 AU 732.3 LD 2.9 km/s
2131-05-10 06:35:00 Juptr 1.5677 AU 610.1 LD 2 km/s
2141-09-14 06:43:00 Juptr 1.676 AU 652.2 LD 2.1 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources