| 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) |
| 2026-06-01 00:00 |
23:54:21.92 |
+15:39:33.4 |
HIP 117826 |
13.34 |
| 2026-06-01 12:00 |
23:54:33.99 |
+15:42:36.4 |
HIP 117849 |
13.24 |
| 2026-06-02 00:00 |
23:54:45.94 |
+15:45:39.1 |
HIP 117849 |
12.65 |
| 2026-06-02 12:00 |
23:54:57.77 |
+15:48:41.4 |
HIP 117849 |
13.39 |
| 2026-06-03 00:00 |
23:55:09.48 |
+15:51:43.4 |
HIP 117849 |
15.24 |
| 2026-06-03 12:00 |
23:55:21.06 |
+15:54:45.0 |
HIP 117849 |
17.84 |
| 2026-06-04 00:00 |
23:55:32.52 |
+15:57:46.2 |
HIP 117849 |
20.90 |
| 2026-06-04 12:00 |
23:55:43.86 |
+16:00:47.1 |
HIP 117995 |
18.20 |
| 2026-06-05 00:00 |
23:55:55.07 |
+16:03:47.6 |
HIP 117995 |
14.74 |
| 2026-06-05 12:00 |
23:56:06.15 |
+16:06:47.7 |
HIP 117995 |
11.66 |
| 2026-06-06 00:00 |
23:56:17.11 |
+16:09:47.3 |
HIP 117995 |
9.31 |
| 2026-06-06 12:00 |
23:56:27.94 |
+16:12:46.6 |
HIP 117995 |
8.30 |
| 2026-06-07 00:00 |
23:56:38.64 |
+16:15:45.5 |
HIP 117995 |
9.06 |
| 2026-06-07 12:00 |
23:56:49.21 |
+16:18:44.0 |
HIP 117995 |
11.20 |
| 2026-06-08 00:00 |
23:56:59.65 |
+16:21:42.1 |
HIP 117995 |
14.08 |
| 2026-06-08 12:00 |
23:57:09.96 |
+16:24:39.7 |
HIP 117995 |
17.33 |
| 2026-06-09 00:00 |
23:57:20.14 |
+16:27:36.9 |
HIP 117995 |
20.75 |
| 2026-06-09 12:00 |
23:57:30.19 |
+16:30:33.7 |
HIP 117995 |
24.27 |
| 2026-06-10 00:00 |
23:57:40.10 |
+16:33:30.0 |
HIP 117995 |
27.83 |
| 2026-06-10 12:00 |
23:57:49.88 |
+16:36:25.8 |
HIP 117969 |
31.04 |
| 2026-06-11 00:00 |
23:57:59.52 |
+16:39:21.2 |
HIP 117969 |
33.61 |
| 2026-06-11 12:00 |
23:58:09.03 |
+16:42:16.2 |
HIP 49 |
34.66 |
| 2026-06-12 00:00 |
23:58:18.40 |
+16:45:10.6 |
HIP 49 |
32.73 |
| 2026-06-12 12:00 |
23:58:27.64 |
+16:48:04.6 |
HIP 49 |
31.16 |
| 2026-06-13 00:00 |
23:58:36.73 |
+16:50:58.1 |
HIP 49 |
29.97 |
| 2026-06-13 12:00 |
23:58:45.69 |
+16:53:51.1 |
HIP 49 |
29.22 |
| 2026-06-14 00:00 |
23:58:54.51 |
+16:56:43.6 |
HIP 68 |
27.30 |
| 2026-06-14 12:00 |
23:59:03.18 |
+16:59:35.6 |
HIP 68 |
25.10 |
| 2026-06-15 00:00 |
23:59:11.72 |
+17:02:27.1 |
HIP 68 |
23.26 |
| 2026-06-15 12:00 |
23:59:20.11 |
+17:05:18.0 |
HIP 68 |
21.87 |
| 2026-06-16 00:00 |
23:59:28.36 |
+17:08:08.4 |
HIP 68 |
21.00 |
| 2026-06-16 12:00 |
23:59:36.46 |
+17:10:58.3 |
HIP 68 |
20.71 |
| 2026-06-17 00:00 |
23:59:44.43 |
+17:13:47.6 |
HIP 68 |
21.00 |
| 2026-06-17 12:00 |
23:59:52.24 |
+17:16:36.4 |
HIP 68 |
21.83 |
| 2026-06-18 00:00 |
23:59:59.91 |
+17:19:24.6 |
HIP 68 |
23.14 |
| 2026-06-18 12:00 |
00:00:07.44 |
+17:22:12.2 |
HIP 68 |
24.85 |
| 2026-06-19 00:00 |
00:00:14.82 |
+17:24:59.3 |
HIP 68 |
26.86 |
| 2026-06-19 12:00 |
00:00:22.05 |
+17:27:45.8 |
HIP 78 |
25.60 |
| 2026-06-20 00:00 |
00:00:29.13 |
+17:30:31.7 |
HIP 78 |
22.46 |
| 2026-06-20 12:00 |
00:00:36.06 |
+17:33:17.0 |
HIP 78 |
19.36 |
| 2026-06-21 00:00 |
00:00:42.85 |
+17:36:01.7 |
HIP 78 |
16.33 |
| 2026-06-21 12:00 |
00:00:49.48 |
+17:38:45.8 |
HIP 78 |
13.39 |
| 2026-06-22 00:00 |
00:00:55.97 |
+17:41:29.2 |
HIP 78 |
10.58 |