| Parameter |
Value |
| Designation |
476P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-11-06T11:32:30.192000Z |
| Orbit solution date (soln_date, UTC) |
2025-04-11T14:45:20Z |
| Obs used |
97 |
| NEO |
- |
| M1 |
16.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-19T03:35:47.472000Z |
| Discovery magnitude (MPC) |
20.40 G |
| Discovery observatory (MPC) |
W62 · Comet Hunter Observatory2, New Ringgold |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-12-05.0000000 |
| e |
0.34832867 |
| q (au) |
3.099035 |
| a (au) |
4.755519 |
| i (deg) |
18.863111 |
| Ω (om, deg) |
59.248376 |
| ω (w, deg) |
47.238057 |
| M (ma, deg) |
189.072051 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.885 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.885 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.813 |
| k |
0.800 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
13:07:41.21 |
+02:53:21.2 |
HIP 64167 |
21.79 |
| 2026-07-29 12:00 |
13:07:57.66 |
+02:49:54.3 |
HIP 64167 |
19.58 |
| 2026-07-30 00:00 |
13:08:14.24 |
+02:46:27.3 |
HIP 64167 |
18.67 |
| 2026-07-30 12:00 |
13:08:30.93 |
+02:43:00.0 |
HIP 64167 |
19.29 |
| 2026-07-31 00:00 |
13:08:47.75 |
+02:39:32.4 |
HIP 64167 |
21.30 |
| 2026-07-31 12:00 |
13:09:04.68 |
+02:36:04.7 |
HIP 64167 |
24.39 |
| 2026-08-01 00:00 |
13:09:21.72 |
+02:32:36.8 |
HIP 64159 |
23.68 |
| 2026-08-01 12:00 |
13:09:38.88 |
+02:29:08.7 |
HIP 64159 |
21.90 |
| 2026-08-02 00:00 |
13:09:56.16 |
+02:25:40.5 |
HIP 64159 |
21.44 |
| 2026-08-02 12:00 |
13:10:13.55 |
+02:22:12.0 |
HIP 64159 |
22.41 |
| 2026-08-03 00:00 |
13:10:31.05 |
+02:18:43.3 |
HIP 64159 |
24.65 |
| 2026-08-03 12:00 |
13:10:48.67 |
+02:15:14.5 |
HIP 64159 |
27.88 |
| 2026-08-04 00:00 |
13:11:06.40 |
+02:11:45.5 |
HIP 64311 |
28.43 |
| 2026-08-04 12:00 |
13:11:24.23 |
+02:08:16.4 |
HIP 64311 |
25.98 |
| 2026-08-05 00:00 |
13:11:42.18 |
+02:04:47.0 |
HIP 64311 |
24.63 |
| 2026-08-05 12:00 |
13:12:00.24 |
+02:01:17.5 |
HIP 64311 |
24.57 |
| 2026-08-06 00:00 |
13:12:18.41 |
+01:57:47.9 |
HIP 64311 |
25.82 |
| 2026-08-06 12:00 |
13:12:36.69 |
+01:54:18.1 |
HIP 64311 |
28.23 |
| 2026-08-07 00:00 |
13:12:55.07 |
+01:50:48.2 |
HIP 64556 |
28.15 |
| 2026-08-07 12:00 |
13:13:13.56 |
+01:47:18.1 |
HIP 64556 |
22.75 |
| 2026-08-08 00:00 |
13:13:32.16 |
+01:43:47.9 |
HIP 64556 |
17.59 |
| 2026-08-08 12:00 |
13:13:50.86 |
+01:40:17.6 |
HIP 64556 |
13.01 |
| 2026-08-09 00:00 |
13:14:09.66 |
+01:36:47.1 |
HIP 64556 |
9.86 |
| 2026-08-09 12:00 |
13:14:28.58 |
+01:33:16.5 |
HIP 64556 |
9.72 |
| 2026-08-10 00:00 |
13:14:47.59 |
+01:29:45.8 |
HIP 64556 |
12.72 |
| 2026-08-10 12:00 |
13:15:06.71 |
+01:26:15.0 |
HIP 64556 |
17.31 |
| 2026-08-11 00:00 |
13:15:25.92 |
+01:22:44.0 |
HIP 64586 |
19.65 |
| 2026-08-11 12:00 |
13:15:45.24 |
+01:19:13.0 |
HIP 64799 |
17.33 |
| 2026-08-12 00:00 |
13:16:04.66 |
+01:15:41.9 |
HIP 64799 |
11.87 |
| 2026-08-12 12:00 |
13:16:24.18 |
+01:12:10.6 |
HIP 64799 |
7.27 |
| 2026-08-13 00:00 |
13:16:43.80 |
+01:08:39.3 |
HIP 64799 |
6.10 |
| 2026-08-13 12:00 |
13:17:03.51 |
+01:05:07.9 |
HIP 64799 |
9.73 |
| 2026-08-14 00:00 |
13:17:23.32 |
+01:01:36.5 |
HIP 64799 |
15.03 |
| 2026-08-14 12:00 |
13:17:43.23 |
+00:58:04.9 |
HIP 64930 |
20.22 |
| 2026-08-15 00:00 |
13:18:03.23 |
+00:54:33.3 |
HIP 64930 |
21.22 |
| 2026-08-15 12:00 |
13:18:23.33 |
+00:51:01.7 |
HIP 64960 |
22.09 |
| 2026-08-16 00:00 |
13:18:43.52 |
+00:47:30.0 |
HIP 64960 |
17.36 |
| 2026-08-16 12:00 |
13:19:03.80 |
+00:43:58.2 |
HIP 64960 |
13.82 |
| 2026-08-17 00:00 |
13:19:24.18 |
+00:40:26.4 |
HIP 64960 |
12.53 |
| 2026-08-17 12:00 |
13:19:44.64 |
+00:36:54.5 |
HIP 64960 |
14.15 |
| 2026-08-18 00:00 |
13:20:05.20 |
+00:33:22.7 |
HIP 64960 |
17.94 |
| 2026-08-18 12:00 |
13:20:25.84 |
+00:29:50.8 |
HIP 64960 |
22.85 |
| 2026-08-19 00:00 |
13:20:46.57 |
+00:26:18.8 |
HIP 64960 |
28.31 |