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Asteroid Near-Earth

85709

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85709 (1998 SG36)

Where is it now

Distance from Sun
2.032 AU
True anomaly
213.26°
Distance from Earth
1.629 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 85709 — 2.032 AU from the Sun 85709
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 85709 is 1.629 AU from Earth today (13.5 light-minutes).

In the sky

Right ascension
06h 31m 47s
Declination
-04° 49′ 45″
Constellation
Monoceros
Distance from Earth
1.62 AU
Elongation from the Sun
98.88° — well clear of the Sun

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
1.646 AU
Eccentricity
0.3376
Inclination
24.83°
Orbital period
771.3 days
Perihelion
1.09 AU
Aphelion
2.202 AU
Longitude of ascending node
186.55°
Argument of periapsis
29.82°
Epoch · J2000
2461200.5
Orbit class · AMO
Amor
Earth MOID · 48.0 LD
0.1235 AU
Tisserand (Jupiter)
4.122

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
5,988
Data arc
27.12 years
First observed
18 September 1998
Last observed
2 November 2025
Residual RMS
0.35 ″
Solution · Otto Matic
28 August 2026

Physical properties

Mean radius
1.12 km
Rotation period
3.57 hours

Visual & observation

Geometric albedo
0.141
Absolute magnitude (H)
15.93

Discovery & classification

Discovered by
LINEAR
Discovery date
26 September 1998
Discovery site
Socorro

Also known as 1998 SG36

Amor Near-Earth Object

Sources