| 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) |
| 2026-05-12 00:00 |
07:07:16.79 |
+27:37:01.3 |
HIP 34222 |
22.71 |
| 2026-05-12 12:00 |
07:07:39.00 |
+27:35:46.4 |
HIP 34522 |
20.63 |
| 2026-05-13 00:00 |
07:08:01.31 |
+27:34:31.3 |
HIP 34522 |
15.83 |
| 2026-05-13 12:00 |
07:08:23.70 |
+27:33:16.2 |
HIP 34522 |
11.28 |
| 2026-05-14 00:00 |
07:08:46.19 |
+27:32:00.9 |
HIP 34522 |
7.49 |
| 2026-05-14 12:00 |
07:09:08.77 |
+27:30:45.5 |
HIP 34522 |
6.14 |
| 2026-05-15 00:00 |
07:09:31.43 |
+27:29:30.0 |
HIP 34522 |
8.53 |
| 2026-05-15 12:00 |
07:09:54.18 |
+27:28:14.3 |
HIP 34522 |
12.72 |
| 2026-05-16 00:00 |
07:10:17.02 |
+27:26:58.5 |
HIP 34522 |
17.48 |
| 2026-05-16 12:00 |
07:10:39.95 |
+27:25:42.6 |
HIP 34799 |
20.73 |
| 2026-05-17 00:00 |
07:11:02.96 |
+27:24:26.5 |
HIP 34799 |
15.72 |
| 2026-05-17 12:00 |
07:11:26.05 |
+27:23:10.3 |
HIP 34799 |
10.92 |
| 2026-05-18 00:00 |
07:11:49.22 |
+27:21:54.0 |
HIP 34799 |
6.85 |
| 2026-05-18 12:00 |
07:12:12.47 |
+27:20:37.5 |
HIP 34799 |
5.55 |
| 2026-05-19 00:00 |
07:12:35.80 |
+27:19:20.9 |
HIP 34860 |
6.55 |
| 2026-05-19 12:00 |
07:12:59.21 |
+27:18:04.2 |
HIP 34860 |
5.09 |
| 2026-05-20 00:00 |
07:13:22.70 |
+27:16:47.3 |
HIP 34860 |
8.16 |
| 2026-05-20 12:00 |
07:13:46.27 |
+27:15:30.3 |
HIP 34860 |
12.87 |
| 2026-05-21 00:00 |
07:14:09.90 |
+27:14:13.1 |
HIP 34860 |
17.98 |
| 2026-05-21 12:00 |
07:14:33.62 |
+27:12:55.8 |
HIP 35130 |
22.24 |
| 2026-05-22 00:00 |
07:14:57.40 |
+27:11:38.4 |
HIP 35191 |
18.58 |
| 2026-05-22 12:00 |
07:15:21.26 |
+27:10:20.8 |
HIP 35191 |
13.14 |
| 2026-05-23 00:00 |
07:15:45.18 |
+27:09:03.1 |
HIP 35191 |
7.72 |
| 2026-05-23 12:00 |
07:16:09.18 |
+27:07:45.2 |
HIP 35191 |
2.50 |
| 2026-05-24 00:00 |
07:16:33.24 |
+27:06:27.2 |
HIP 35191 |
3.67 |
| 2026-05-24 12:00 |
07:16:57.37 |
+27:05:09.0 |
HIP 35191 |
9.04 |
| 2026-05-25 00:00 |
07:17:21.57 |
+27:03:50.7 |
HIP 35191 |
14.54 |
| 2026-05-25 12:00 |
07:17:45.83 |
+27:02:32.3 |
HIP 35377 |
15.86 |
| 2026-05-26 00:00 |
07:18:10.16 |
+27:01:13.7 |
HIP 35377 |
14.57 |
| 2026-05-26 12:00 |
07:18:34.55 |
+26:59:54.9 |
HIP 35377 |
15.33 |
| 2026-05-27 00:00 |
07:18:59.00 |
+26:58:36.0 |
HIP 35494 |
11.63 |
| 2026-05-27 12:00 |
07:19:23.51 |
+26:57:17.0 |
HIP 35494 |
8.07 |
| 2026-05-28 00:00 |
07:19:48.09 |
+26:55:57.8 |
HIP 35494 |
7.63 |
| 2026-05-28 12:00 |
07:20:12.72 |
+26:54:38.4 |
HIP 35494 |
10.73 |
| 2026-05-29 00:00 |
07:20:37.41 |
+26:53:18.9 |
HIP 35494 |
15.37 |
| 2026-05-29 12:00 |
07:21:02.16 |
+26:51:59.2 |
HIP 35659 |
13.48 |
| 2026-05-30 00:00 |
07:21:26.97 |
+26:50:39.4 |
HIP 35659 |
13.47 |
| 2026-05-30 12:00 |
07:21:51.83 |
+26:49:19.4 |
HIP 35659 |
15.69 |
| 2026-05-31 00:00 |
07:22:16.75 |
+26:47:59.3 |
HIP 35659 |
19.40 |
| 2026-05-31 12:00 |
07:22:41.72 |
+26:46:39.0 |
HIP 35659 |
23.92 |
| 2026-06-01 00:00 |
07:23:06.75 |
+26:45:18.6 |
HIP 35967 |
24.00 |
| 2026-06-01 12:00 |
07:23:31.83 |
+26:43:57.9 |
HIP 35967 |
18.27 |
| 2026-06-02 00:00 |
07:23:56.96 |
+26:42:37.2 |
HIP 35967 |
12.56 |