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Comet

Nanshan-Hahn

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P/2024 FG9 (Nanshan-Hahn)

Where is it now

Distance from Sun
4.793 AU
True anomaly
167.13°
Distance from Earth
4.59 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 Nanshan-Hahn — 4.793 AU from the Sun Nanshan-Hahn
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Nanshan-Hahn is 4.59 AU from Earth today (38.2 light-minutes).

In the sky

Right ascension
19h 43m 01s
Declination
-19° 51′ 59″
Constellation
Sagittarius
Distance from Earth
4.6 AU
Elongation from the Sun
95.12° — well clear of the Sun

Favours the southern hemisphere; low or below the horizon from far north.

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
3.257 AU
Eccentricity
0.5099
Inclination
1.73°
Orbital period
5.88 years
Perihelion
1.596 AU
Aphelion
4.918 AU
Longitude of ascending node
253.04°
Argument of periapsis
245.89°
Epoch · J2000
2460313.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 237.7 LD
0.6107 AU
Tisserand (Jupiter)
2.958

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
136
Data arc
6.32 years
First observed
29 March 2018
Last observed
23 July 2024
Residual RMS
0.57 ″
Solution · Otto Matic
26 October 2024

Visual & observation

Absolute magnitude (H)
10.4
Total magnitude M₁ · K₁ 32
10.4

Discovery & classification

Also known as 2024 FG9

Named

Close approaches 17 on record

When (UTC) Body Distance Lunar distances Relative speed
2033-04-16 09:10:00 Juptr 0.203 AU 79.0 LD 4.9 km/s
2033-04-16 09:10:00 Jupiter 0.203 AU 79.0 LD 4.9 km/s
2044-11-06 20:40:00 Juptr 1.3429 AU 522.6 LD 7.8 km/s
2104-11-01 04:27:00 Juptr 1.8182 AU 707.6 LD 9.2 km/s
2116-08-28 08:23:00 Juptr 0.1218 AU 47.4 LD 5.5 km/s
2116-08-28 08:23:00 Jupiter 0.1218 AU 47.4 LD 5.5 km/s
2128-05-21 10:19:00 Juptr 0.141 AU 54.9 LD 5.4 km/s
2128-05-21 10:19:00 Jupiter 0.141 AU 54.9 LD 5.4 km/s
2131-12-29 05:17:00 Juptr 1.8098 AU 704.3 LD 3.1 km/s

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

Sources