| Parameter |
Value |
| Designation |
488P/NEAT-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-02-25T20:27:35.637120Z |
| Orbit solution date (soln_date, UTC) |
2024-10-26T00:12:33Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
16.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2002-08-29T05:09:46.368000Z |
| Discovery magnitude (MPC) |
19.00 R |
| Discovery observatory (MPC) |
644 · Palomar Mountain/NEAT |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-04-27.0000000 |
| e |
0.55045765 |
| q (au) |
1.679899 |
| a (au) |
3.736909 |
| i (deg) |
11.366619 |
| Ω (om, deg) |
324.110333 |
| ω (w, deg) |
1.302662 |
| M (ma, deg) |
157.742457 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.185 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.185 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
08:55:45.92 |
+21:06:17.3 |
HIP 43985 |
27.66 |
| 2026-09-20 12:00 |
08:56:05.50 |
+21:04:53.4 |
HIP 43985 |
24.82 |
| 2026-09-21 00:00 |
08:56:24.97 |
+21:03:29.9 |
HIP 43985 |
22.64 |
| 2026-09-21 12:00 |
08:56:44.35 |
+21:02:06.7 |
HIP 43985 |
21.32 |
| 2026-09-22 00:00 |
08:57:03.63 |
+21:00:43.8 |
HIP 43985 |
21.00 |
| 2026-09-22 12:00 |
08:57:22.81 |
+20:59:21.4 |
HIP 43985 |
21.71 |
| 2026-09-23 00:00 |
08:57:41.88 |
+20:57:59.2 |
HIP 44097 |
21.00 |
| 2026-09-23 12:00 |
08:58:00.85 |
+20:56:37.5 |
HIP 44097 |
18.51 |
| 2026-09-24 00:00 |
08:58:19.72 |
+20:55:16.1 |
HIP 44097 |
16.95 |
| 2026-09-24 12:00 |
08:58:38.48 |
+20:53:55.1 |
HIP 44097 |
16.57 |
| 2026-09-25 00:00 |
08:58:57.14 |
+20:52:34.4 |
HIP 44097 |
17.41 |
| 2026-09-25 12:00 |
08:59:15.69 |
+20:51:14.2 |
HIP 44097 |
19.31 |
| 2026-09-26 00:00 |
08:59:34.13 |
+20:49:54.3 |
HIP 44072 |
21.57 |
| 2026-09-26 12:00 |
08:59:52.47 |
+20:48:34.8 |
HIP 44072 |
23.52 |
| 2026-09-27 00:00 |
09:00:10.70 |
+20:47:15.7 |
HIP 44072 |
26.09 |
| 2026-09-27 12:00 |
09:00:28.82 |
+20:45:57.1 |
HIP 44072 |
29.10 |
| 2026-09-28 00:00 |
09:00:46.83 |
+20:44:38.8 |
HIP 44072 |
32.42 |
| 2026-09-28 12:00 |
09:01:04.73 |
+20:43:20.9 |
HIP 44072 |
35.96 |
| 2026-09-29 00:00 |
09:01:22.53 |
+20:42:03.5 |
HIP 44467 |
32.29 |
| 2026-09-29 12:00 |
09:01:40.21 |
+20:40:46.4 |
HIP 44467 |
27.96 |
| 2026-09-30 00:00 |
09:01:57.77 |
+20:39:29.8 |
HIP 44467 |
23.66 |
| 2026-09-30 12:00 |
09:02:15.23 |
+20:38:13.6 |
HIP 44467 |
19.39 |
| 2026-10-01 00:00 |
09:02:32.57 |
+20:36:57.9 |
HIP 44467 |
15.14 |
| 2026-10-01 12:00 |
09:02:49.79 |
+20:35:42.6 |
HIP 44467 |
10.93 |
| 2026-10-02 00:00 |
09:03:06.90 |
+20:34:27.7 |
HIP 44467 |
6.76 |
| 2026-10-02 12:00 |
09:03:23.89 |
+20:33:13.3 |
HIP 44467 |
2.68 |
| 2026-10-03 00:00 |
09:03:40.77 |
+20:31:59.4 |
HIP 44467 |
1.81 |
| 2026-10-03 12:00 |
09:03:57.52 |
+20:30:45.9 |
HIP 44467 |
5.77 |
| 2026-10-04 00:00 |
09:04:14.16 |
+20:29:32.8 |
HIP 44467 |
9.83 |
| 2026-10-04 12:00 |
09:04:30.68 |
+20:28:20.3 |
HIP 44467 |
13.87 |
| 2026-10-05 00:00 |
09:04:47.07 |
+20:27:08.2 |
HIP 44467 |
17.89 |
| 2026-10-05 12:00 |
09:05:03.35 |
+20:25:56.6 |
HIP 44467 |
21.88 |
| 2026-10-06 00:00 |
09:05:19.50 |
+20:24:45.5 |
HIP 44716 |
20.41 |
| 2026-10-06 12:00 |
09:05:35.52 |
+20:23:34.9 |
HIP 44716 |
17.30 |
| 2026-10-07 00:00 |
09:05:51.43 |
+20:22:24.8 |
HIP 44716 |
14.60 |
| 2026-10-07 12:00 |
09:06:07.20 |
+20:21:15.2 |
HIP 44716 |
12.57 |
| 2026-10-08 00:00 |
09:06:22.85 |
+20:20:06.1 |
HIP 44716 |
11.53 |
| 2026-10-08 12:00 |
09:06:38.37 |
+20:18:57.6 |
HIP 44716 |
11.71 |
| 2026-10-09 00:00 |
09:06:53.76 |
+20:17:49.5 |
HIP 44705 |
11.79 |
| 2026-10-09 12:00 |
09:07:09.02 |
+20:16:42.0 |
HIP 44705 |
12.84 |
| 2026-10-10 00:00 |
09:07:24.15 |
+20:15:35.1 |
HIP 44705 |
14.78 |
| 2026-10-10 12:00 |
09:07:39.15 |
+20:14:28.6 |
HIP 44705 |
17.29 |
| 2026-10-11 00:00 |
09:07:54.02 |
+20:13:22.8 |
HIP 44705 |
20.14 |