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Asteroid Near-Earth

30825

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30825 (1990 TG1)

Where is it now

Distance from Sun
3.885 AU
True anomaly
192.94°
Distance from Earth
3.381 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 30825 — 3.885 AU from the Sun 30825
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 30825 is 3.381 AU from Earth today (28.1 light-minutes).

In the sky

Right ascension
05h 39m 18s
Declination
+16° 02′ 24″
Constellation
Taurus
Distance from Earth
3.37 AU
Elongation from the Sun
113.85° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
2.436 AU
Eccentricity
0.6808
Inclination
8.74°
Orbital period
3.8 years
Perihelion
0.778 AU
Aphelion
4.095 AU
Longitude of ascending node
205.01°
Argument of periapsis
33.67°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 27.0 LD
0.0695 AU
Tisserand (Jupiter)
3.126

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
3,476
Data arc
35.32 years
First observed
16 September 1990
Last observed
9 January 2026
Residual RMS
0.37 ″
Solution · Otto Matic
10 January 2026

Physical properties

Rotation period
2.62 hours

Visual & observation

Absolute magnitude (H)
14.73

Discovery & classification

Discovered by
Spacewatch
Discovery date
14 October 1990
Discovery site
Kitt Peak

Also known as 1990 TG1 · 2000 YP29

Apollo Near-Earth Object

Close approaches 19 on record

Flyby geometry
Ecliptic flyby of 30825 at 2066-07-02 09:50 UTC Top-down view of the ecliptic, Earth at the centre, for the 2066-07-02 09:50 UTC close approach of 30825. Catalogue miss distance 72.4 LD · 2.78 × 10⁷ km. The curve is the geocentric path from 2066-06-29 to 2066-07-05, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 72.4 LD · 2.78 × 10⁷ km 2066-07-02 09:50 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2066-07-02 09:50 UTC close approach of 30825. Catalogue miss distance 72.4 LD · 2.78 × 10⁷ km. The curve is the geocentric path from 2066-06-29 to 2066-07-05, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2035-10-08 14:14:00 Venus 0.0697 AU 27.1 LD 11.4 km/s
2060-02-14 04:25:00 Juptr 1.7356 AU 675.5 LD 8.7 km/s
2066-07-02 09:50:00 Earth 0.1859 AU 72.4 LD 13.2 km/s
2071-11-09 04:10:00 Juptr 1.2494 AU 486.2 LD 6.7 km/s
2083-09-06 06:41:00 Juptr 1.0489 AU 408.2 LD 5.8 km/s
2095-07-22 08:28:00 Juptr 1.0154 AU 395.2 LD 5.6 km/s
2107-06-19 05:39:00 Juptr 1.0976 AU 427.2 LD 5.9 km/s
2119-06-04 05:49:00 Juptr 1.4364 AU 559.0 LD 7.2 km/s
2146-05-29 15:34:00 Earth 0.1133 AU 44.1 LD 9.9 km/s
2183-04-09 13:12:00 Earth 0.1021 AU 39.7 LD 14.5 km/s

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

Sources