| Parameter |
Value |
| Designation |
180P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-12-12T15:22:26.811840Z |
| Orbit solution date (soln_date, UTC) |
2024-03-20T08:31:27Z |
| Obs used |
1053 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
22.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-04-24.0000000 |
| e |
0.35485436 |
| q (au) |
2.489292 |
| a (au) |
3.858497 |
| i (deg) |
16.870826 |
| Ω (om, deg) |
84.571386 |
| ω (w, deg) |
94.861225 |
| M (ma, deg) |
17.342053 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.358 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.358 |
| n |
6.000 |
| gf |
1.000 |
| 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 |
| 2022-09-29 |
2023-06-28 |
+16.2858 |
-6.848 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
23:47:58.33 |
-22:25:42.3 |
HIP 117370 |
10.90 |
| 2026-07-29 12:00 |
23:47:50.81 |
-22:28:11.7 |
HIP 117370 |
8.36 |
| 2026-07-30 00:00 |
23:47:43.10 |
-22:30:41.7 |
HIP 117370 |
6.29 |
| 2026-07-30 12:00 |
23:47:35.20 |
-22:33:12.1 |
HIP 117370 |
5.32 |
| 2026-07-31 00:00 |
23:47:27.11 |
-22:35:42.9 |
HIP 117370 |
6.06 |
| 2026-07-31 12:00 |
23:47:18.82 |
-22:38:14.2 |
HIP 117370 |
8.10 |
| 2026-08-01 00:00 |
23:47:10.35 |
-22:40:45.8 |
HIP 117370 |
10.74 |
| 2026-08-01 12:00 |
23:47:01.68 |
-22:43:17.9 |
HIP 117370 |
13.66 |
| 2026-08-02 00:00 |
23:46:52.83 |
-22:45:50.3 |
HIP 117370 |
16.73 |
| 2026-08-02 12:00 |
23:46:43.79 |
-22:48:23.0 |
HIP 117247 |
13.85 |
| 2026-08-03 00:00 |
23:46:34.56 |
-22:50:56.0 |
HIP 117247 |
10.88 |
| 2026-08-03 12:00 |
23:46:25.14 |
-22:53:29.4 |
HIP 117247 |
8.19 |
| 2026-08-04 00:00 |
23:46:15.54 |
-22:56:03.0 |
HIP 117247 |
6.19 |
| 2026-08-04 12:00 |
23:46:05.75 |
-22:58:36.8 |
HIP 117247 |
5.73 |
| 2026-08-05 00:00 |
23:45:55.78 |
-23:01:10.9 |
HIP 117247 |
7.16 |
| 2026-08-05 12:00 |
23:45:45.63 |
-23:03:45.2 |
HIP 117247 |
9.70 |
| 2026-08-06 00:00 |
23:45:35.29 |
-23:06:19.7 |
HIP 117135 |
11.60 |
| 2026-08-06 12:00 |
23:45:24.78 |
-23:08:54.4 |
HIP 117135 |
8.52 |
| 2026-08-07 00:00 |
23:45:14.08 |
-23:11:29.1 |
HIP 117135 |
5.92 |
| 2026-08-07 12:00 |
23:45:03.21 |
-23:14:04.1 |
HIP 117135 |
4.76 |
| 2026-08-08 00:00 |
23:44:52.15 |
-23:16:39.1 |
HIP 117135 |
6.01 |
| 2026-08-08 12:00 |
23:44:40.93 |
-23:19:14.1 |
HIP 117135 |
8.71 |
| 2026-08-09 00:00 |
23:44:29.52 |
-23:21:49.3 |
HIP 117142 |
10.01 |
| 2026-08-09 12:00 |
23:44:17.94 |
-23:24:24.4 |
HIP 117142 |
9.95 |
| 2026-08-10 00:00 |
23:44:06.19 |
-23:26:59.6 |
HIP 117142 |
11.23 |
| 2026-08-10 12:00 |
23:43:54.27 |
-23:29:34.7 |
HIP 117142 |
13.50 |
| 2026-08-11 00:00 |
23:43:42.18 |
-23:32:09.7 |
HIP 117005 |
11.07 |
| 2026-08-11 12:00 |
23:43:29.92 |
-23:34:44.7 |
HIP 117005 |
7.29 |
| 2026-08-12 00:00 |
23:43:17.50 |
-23:37:19.6 |
HIP 117005 |
3.58 |
| 2026-08-12 12:00 |
23:43:04.91 |
-23:39:54.3 |
HIP 117005 |
1.44 |
| 2026-08-13 00:00 |
23:42:52.16 |
-23:42:28.9 |
HIP 117005 |
4.65 |
| 2026-08-13 12:00 |
23:42:39.24 |
-23:45:03.3 |
HIP 117005 |
8.48 |
| 2026-08-14 00:00 |
23:42:26.17 |
-23:47:37.5 |
HIP 117005 |
12.39 |
| 2026-08-14 12:00 |
23:42:12.94 |
-23:50:11.4 |
HIP 117005 |
16.35 |
| 2026-08-15 00:00 |
23:41:59.56 |
-23:52:45.1 |
HIP 117005 |
20.33 |
| 2026-08-15 12:00 |
23:41:46.02 |
-23:55:18.5 |
HIP 116851 |
16.87 |
| 2026-08-16 00:00 |
23:41:32.34 |
-23:57:51.5 |
HIP 116851 |
13.11 |
| 2026-08-16 12:00 |
23:41:18.50 |
-24:00:24.3 |
HIP 116851 |
9.59 |
| 2026-08-17 00:00 |
23:41:04.51 |
-24:02:56.6 |
HIP 116851 |
6.71 |
| 2026-08-17 12:00 |
23:40:50.39 |
-24:05:28.6 |
HIP 116851 |
5.62 |
| 2026-08-18 00:00 |
23:40:36.11 |
-24:08:00.1 |
HIP 116851 |
7.23 |
| 2026-08-18 12:00 |
23:40:21.70 |
-24:10:31.2 |
HIP 116851 |
10.37 |
| 2026-08-19 00:00 |
23:40:07.15 |
-24:13:01.9 |
HIP 116851 |
14.06 |