| Parameter |
Value |
| Designation |
464P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-02-28T09:38:59.409600Z |
| Orbit solution date (soln_date, UTC) |
2024-08-18T18:42:26Z |
| Obs used |
175 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2014-07-25T10:20:03.840000Z |
| Discovery magnitude (MPC) |
21.50 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-06-17.0000000 |
| e |
0.28094023 |
| q (au) |
3.372325 |
| a (au) |
4.689909 |
| i (deg) |
21.665175 |
| Ω (om, deg) |
309.606244 |
| ω (w, deg) |
267.729176 |
| M (ma, deg) |
335.118359 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.375 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.375 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.502 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2022-01-09 |
2023-02-03 |
+34.8067 |
-18.081 |
| 2023-03-15 |
2024-08-06 |
+13.0591 |
-7.225 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
23:38:29.04 |
+20:55:49.0 |
HIP 116636 |
22.11 |
| 2026-09-20 12:00 |
23:38:12.35 |
+20:54:45.5 |
HIP 116636 |
20.61 |
| 2026-09-21 00:00 |
23:37:55.69 |
+20:53:40.8 |
HIP 116636 |
19.81 |
| 2026-09-21 12:00 |
23:37:39.04 |
+20:52:34.8 |
HIP 116636 |
19.80 |
| 2026-09-22 00:00 |
23:37:22.41 |
+20:51:27.5 |
HIP 116502 |
17.19 |
| 2026-09-22 12:00 |
23:37:05.81 |
+20:50:19.0 |
HIP 116502 |
13.66 |
| 2026-09-23 00:00 |
23:36:49.23 |
+20:49:09.3 |
HIP 116502 |
10.49 |
| 2026-09-23 12:00 |
23:36:32.69 |
+20:47:58.3 |
HIP 116502 |
8.13 |
| 2026-09-24 00:00 |
23:36:16.17 |
+20:46:46.1 |
HIP 116502 |
7.37 |
| 2026-09-24 12:00 |
23:35:59.69 |
+20:45:32.7 |
HIP 116502 |
8.66 |
| 2026-09-25 00:00 |
23:35:43.24 |
+20:44:18.2 |
HIP 116441 |
9.45 |
| 2026-09-25 12:00 |
23:35:26.83 |
+20:43:02.5 |
HIP 116441 |
8.98 |
| 2026-09-26 00:00 |
23:35:10.47 |
+20:41:45.6 |
HIP 116441 |
10.21 |
| 2026-09-26 12:00 |
23:34:54.15 |
+20:40:27.6 |
HIP 116441 |
12.65 |
| 2026-09-27 00:00 |
23:34:37.87 |
+20:39:08.5 |
HIP 116307 |
15.04 |
| 2026-09-27 12:00 |
23:34:21.64 |
+20:37:48.3 |
HIP 116307 |
14.05 |
| 2026-09-28 00:00 |
23:34:05.47 |
+20:36:27.0 |
HIP 116307 |
14.20 |
| 2026-09-28 12:00 |
23:33:49.34 |
+20:35:04.7 |
HIP 116307 |
15.45 |
| 2026-09-29 00:00 |
23:33:33.28 |
+20:33:41.3 |
HIP 116213 |
17.07 |
| 2026-09-29 12:00 |
23:33:17.27 |
+20:32:16.8 |
HIP 116213 |
13.80 |
| 2026-09-30 00:00 |
23:33:01.32 |
+20:30:51.3 |
HIP 116213 |
11.01 |
| 2026-09-30 12:00 |
23:32:45.43 |
+20:29:24.9 |
HIP 116213 |
9.15 |
| 2026-10-01 00:00 |
23:32:29.61 |
+20:27:57.4 |
HIP 116213 |
8.82 |
| 2026-10-01 12:00 |
23:32:13.86 |
+20:26:29.0 |
HIP 116213 |
10.15 |
| 2026-10-02 00:00 |
23:31:58.18 |
+20:24:59.6 |
HIP 116213 |
12.62 |
| 2026-10-02 12:00 |
23:31:42.57 |
+20:23:29.3 |
HIP 116213 |
15.70 |
| 2026-10-03 00:00 |
23:31:27.04 |
+20:21:58.0 |
HIP 116054 |
14.92 |
| 2026-10-03 12:00 |
23:31:11.58 |
+20:20:25.9 |
HIP 116000 |
14.93 |
| 2026-10-04 00:00 |
23:30:56.20 |
+20:18:52.8 |
HIP 116000 |
12.48 |
| 2026-10-04 12:00 |
23:30:40.91 |
+20:17:18.9 |
HIP 116000 |
10.94 |
| 2026-10-05 00:00 |
23:30:25.70 |
+20:15:44.2 |
HIP 116000 |
10.71 |
| 2026-10-05 12:00 |
23:30:10.57 |
+20:14:08.6 |
HIP 116000 |
11.85 |
| 2026-10-06 00:00 |
23:29:55.54 |
+20:12:32.3 |
HIP 116000 |
14.02 |
| 2026-10-06 12:00 |
23:29:40.59 |
+20:10:55.1 |
HIP 116000 |
16.82 |
| 2026-10-07 00:00 |
23:29:25.75 |
+20:09:17.2 |
HIP 116000 |
19.97 |
| 2026-10-07 12:00 |
23:29:10.99 |
+20:07:38.5 |
HIP 115856 |
18.29 |
| 2026-10-08 00:00 |
23:28:56.34 |
+20:05:59.1 |
HIP 115856 |
14.98 |
| 2026-10-08 12:00 |
23:28:41.79 |
+20:04:19.0 |
HIP 115856 |
11.97 |
| 2026-10-09 00:00 |
23:28:27.34 |
+20:02:38.2 |
HIP 115856 |
9.54 |
| 2026-10-09 12:00 |
23:28:12.99 |
+20:00:56.8 |
HIP 115856 |
8.19 |
| 2026-10-10 00:00 |
23:27:58.76 |
+19:59:14.7 |
HIP 115783 |
8.17 |
| 2026-10-10 12:00 |
23:27:44.63 |
+19:57:32.0 |
HIP 115783 |
5.36 |
| 2026-10-11 00:00 |
23:27:30.62 |
+19:55:48.7 |
HIP 115783 |
4.32 |