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Asteroid Near-Earth

5646

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5646 (1990 TR)

Where is it now

Distance from Sun
3.079 AU
True anomaly
180.98°
Distance from Earth
3.99 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 5646 — 3.079 AU from the Sun 5646
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 5646 is 3.99 AU from Earth today (33.2 light-minutes).

In the sky

Right ascension
11h 55m 52s
Declination
+03° 03′ 10″
Constellation
Virgo
Distance from Earth
3.99 AU
Elongation from the Sun
21.25° — 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
2.144 AU
Eccentricity
0.4363
Inclination
7.91°
Orbital period
3.14 years
Perihelion
1.208 AU
Aphelion
3.079 AU
Longitude of ascending node
14.03°
Argument of periapsis
335.84°
Epoch · J2000
2461200.5
Orbit class · AMO
Amor
Earth MOID · 81.7 LD
0.21 AU
Tisserand (Jupiter)
3.571

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
2,656
Data arc
35.95 years
First observed
3 May 1990
Last observed
15 April 2026
Residual RMS
0.45 ″
Solution · Otto Matic
31 August 2026

Physical properties

Mean radius
2.15 km
Rotation period
3.2 hours

Visual & observation

Geometric albedo
0.223
Absolute magnitude (H)
15.51
Spectral type (SMASS)
U

Discovery & classification

Discovered by
Ueda, S., Kaneda, H.
Discovery date
11 October 1990
Discovery site
Kushiro

Also known as 1990 TR

Amor Near-Earth Object

Sources