226P/Pigott-LINEAR-Kowalski
| Parameter |
Value |
| Designation |
226P/Pigott-LINEAR-Kowalski |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-09-04T12:35:50.089920Z |
| Orbit solution date (soln_date, UTC) |
2024-07-01T08:58:31Z |
| Obs used |
1679 |
| NEO |
- |
| M1 |
10.100 |
| K1 |
21.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-03-24.0000000 |
| e |
0.52818078 |
| q (au) |
1.778058 |
| a (au) |
3.768516 |
| i (deg) |
44.003907 |
| Ω (om, deg) |
54.006950 |
| ω (w, deg) |
341.100239 |
| M (ma, deg) |
125.358382 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.651 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.651 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2023-07-26 |
2024-04-12 |
+17.6275 |
-4.597 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
14:30:25.38 |
+21:46:32.5 |
HIP 70916 |
4.54 |
| 2026-02-03 12:00 |
14:30:27.10 |
+21:48:40.7 |
HIP 70916 |
4.28 |
| 2026-02-04 00:00 |
14:30:28.60 |
+21:50:49.8 |
HIP 70916 |
5.00 |
| 2026-02-04 12:00 |
14:30:29.88 |
+21:53:00.0 |
HIP 70916 |
6.39 |
| 2026-02-05 00:00 |
14:30:30.94 |
+21:55:11.0 |
HIP 70916 |
8.12 |
| 2026-02-05 12:00 |
14:30:31.77 |
+21:57:23.1 |
HIP 70916 |
10.02 |
| 2026-02-06 00:00 |
14:30:32.37 |
+21:59:36.0 |
HIP 70916 |
12.01 |
| 2026-02-06 12:00 |
14:30:32.75 |
+22:01:49.8 |
HIP 70916 |
14.07 |
| 2026-02-07 00:00 |
14:30:32.90 |
+22:04:04.6 |
HIP 70916 |
16.17 |
| 2026-02-07 12:00 |
14:30:32.82 |
+22:06:20.2 |
HIP 70916 |
18.30 |
| 2026-02-08 00:00 |
14:30:32.52 |
+22:08:36.6 |
HIP 70916 |
20.45 |
| 2026-02-08 12:00 |
14:30:31.99 |
+22:10:53.9 |
HIP 71072 |
21.76 |
| 2026-02-09 00:00 |
14:30:31.22 |
+22:13:12.0 |
HIP 71072 |
22.68 |
| 2026-02-09 12:00 |
14:30:30.23 |
+22:15:30.9 |
HIP 71072 |
23.84 |
| 2026-02-10 00:00 |
14:30:29.00 |
+22:17:50.6 |
HIP 71072 |
25.21 |
| 2026-02-10 12:00 |
14:30:27.54 |
+22:20:11.0 |
HIP 71072 |
26.77 |
| 2026-02-11 00:00 |
14:30:25.85 |
+22:22:32.2 |
HIP 71072 |
28.49 |
| 2026-02-11 12:00 |
14:30:23.93 |
+22:24:54.1 |
HIP 71072 |
30.35 |
| 2026-02-12 00:00 |
14:30:21.78 |
+22:27:16.7 |
HIP 71072 |
32.33 |
| 2026-02-12 12:00 |
14:30:19.39 |
+22:29:40.0 |
HIP 71115 |
33.86 |
| 2026-02-13 00:00 |
14:30:16.76 |
+22:32:03.9 |
HIP 71115 |
35.46 |
| 2026-02-13 12:00 |
14:30:13.90 |
+22:34:28.5 |
HIP 71115 |
37.20 |
| 2026-02-14 00:00 |
14:30:10.81 |
+22:36:53.7 |
HIP 71115 |
39.08 |
| 2026-02-14 12:00 |
14:30:07.48 |
+22:39:19.5 |
HIP 70678 |
38.16 |
| 2026-02-15 00:00 |
14:30:03.91 |
+22:41:45.9 |
HIP 70678 |
37.18 |
| 2026-02-15 12:00 |
14:30:00.11 |
+22:44:12.8 |
HIP 70678 |
36.30 |
| 2026-02-16 00:00 |
14:29:56.07 |
+22:46:40.2 |
HIP 70750 |
34.90 |
| 2026-02-16 12:00 |
14:29:51.79 |
+22:49:08.2 |
HIP 70750 |
32.47 |
| 2026-02-17 00:00 |
14:29:47.28 |
+22:51:36.6 |
HIP 70750 |
30.02 |
| 2026-02-17 12:00 |
14:29:42.53 |
+22:54:05.5 |
HIP 70750 |
27.58 |
| 2026-02-18 00:00 |
14:29:37.54 |
+22:56:34.8 |
HIP 70750 |
25.14 |
| 2026-02-18 12:00 |
14:29:32.31 |
+22:59:04.5 |
HIP 70750 |
22.72 |
| 2026-02-19 00:00 |
14:29:26.85 |
+23:01:34.5 |
HIP 70750 |
20.34 |
| 2026-02-19 12:00 |
14:29:21.15 |
+23:04:05.0 |
HIP 70750 |
18.03 |
| 2026-02-20 00:00 |
14:29:15.21 |
+23:06:35.7 |
HIP 70750 |
15.84 |
| 2026-02-20 12:00 |
14:29:09.04 |
+23:09:06.8 |
HIP 70750 |
13.83 |
| 2026-02-21 00:00 |
14:29:02.63 |
+23:11:38.1 |
HIP 70750 |
12.14 |
| 2026-02-21 12:00 |
14:28:55.98 |
+23:14:09.7 |
HIP 70750 |
10.92 |
| 2026-02-22 00:00 |
14:28:49.09 |
+23:16:41.5 |
HIP 70750 |
10.37 |
| 2026-02-22 12:00 |
14:28:41.97 |
+23:19:13.5 |
HIP 70750 |
10.63 |
| 2026-02-23 00:00 |
14:28:34.62 |
+23:21:45.7 |
HIP 70750 |
11.67 |
| 2026-02-23 12:00 |
14:28:27.03 |
+23:24:18.0 |
HIP 70750 |
13.32 |
| 2026-02-24 00:00 |
14:28:19.20 |
+23:26:50.4 |
HIP 70750 |
15.42 |