| 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) |
| 2026-06-01 00:00 |
13:28:35.66 |
+24:31:08.0 |
HIP 65661 |
13.44 |
| 2026-06-01 12:00 |
13:28:23.44 |
+24:28:19.1 |
HIP 65661 |
9.66 |
| 2026-06-02 00:00 |
13:28:11.42 |
+24:25:28.8 |
HIP 65661 |
6.15 |
| 2026-06-02 12:00 |
13:27:59.60 |
+24:22:37.0 |
HIP 65661 |
3.72 |
| 2026-06-03 00:00 |
13:27:47.98 |
+24:19:43.9 |
HIP 65643 |
4.22 |
| 2026-06-03 12:00 |
13:27:36.55 |
+24:16:49.4 |
HIP 65643 |
2.41 |
| 2026-06-04 00:00 |
13:27:25.32 |
+24:13:53.5 |
HIP 65643 |
4.94 |
| 2026-06-04 12:00 |
13:27:14.29 |
+24:10:56.3 |
HIP 65643 |
8.56 |
| 2026-06-05 00:00 |
13:27:03.46 |
+24:07:57.7 |
HIP 65643 |
12.34 |
| 2026-06-05 12:00 |
13:26:52.83 |
+24:04:57.9 |
HIP 65643 |
16.16 |
| 2026-06-06 00:00 |
13:26:42.39 |
+24:01:56.8 |
HIP 65643 |
19.98 |
| 2026-06-06 12:00 |
13:26:32.16 |
+23:58:54.4 |
HIP 65466 |
20.97 |
| 2026-06-07 00:00 |
13:26:22.13 |
+23:55:50.7 |
HIP 65466 |
17.84 |
| 2026-06-07 12:00 |
13:26:12.29 |
+23:52:45.8 |
HIP 65466 |
15.07 |
| 2026-06-08 00:00 |
13:26:02.66 |
+23:49:39.7 |
HIP 65466 |
12.90 |
| 2026-06-08 12:00 |
13:25:53.22 |
+23:46:32.3 |
HIP 65466 |
11.65 |
| 2026-06-09 00:00 |
13:25:43.99 |
+23:43:23.8 |
HIP 65466 |
11.61 |
| 2026-06-09 12:00 |
13:25:34.96 |
+23:40:14.1 |
HIP 65466 |
12.79 |
| 2026-06-10 00:00 |
13:25:26.13 |
+23:37:03.2 |
HIP 65556 |
14.19 |
| 2026-06-10 12:00 |
13:25:17.50 |
+23:33:51.2 |
HIP 65556 |
15.73 |
| 2026-06-11 00:00 |
13:25:09.07 |
+23:30:38.1 |
HIP 65556 |
17.89 |
| 2026-06-11 12:00 |
13:25:00.84 |
+23:27:23.8 |
HIP 65419 |
17.50 |
| 2026-06-12 00:00 |
13:24:52.82 |
+23:24:08.5 |
HIP 65419 |
13.79 |
| 2026-06-12 12:00 |
13:24:44.99 |
+23:20:52.0 |
HIP 65419 |
10.10 |
| 2026-06-13 00:00 |
13:24:37.37 |
+23:17:34.5 |
HIP 65419 |
6.46 |
| 2026-06-13 12:00 |
13:24:29.94 |
+23:14:16.0 |
HIP 65419 |
3.01 |
| 2026-06-14 00:00 |
13:24:22.72 |
+23:10:56.4 |
HIP 65419 |
2.00 |
| 2026-06-14 12:00 |
13:24:15.70 |
+23:07:35.8 |
HIP 65419 |
5.13 |
| 2026-06-15 00:00 |
13:24:08.89 |
+23:04:14.2 |
HIP 65419 |
8.72 |
| 2026-06-15 12:00 |
13:24:02.27 |
+23:00:51.6 |
HIP 65419 |
12.36 |
| 2026-06-16 00:00 |
13:23:55.85 |
+22:57:28.1 |
HIP 65419 |
16.03 |
| 2026-06-16 12:00 |
13:23:49.64 |
+22:54:03.6 |
HIP 65419 |
19.70 |
| 2026-06-17 00:00 |
13:23:43.62 |
+22:50:38.1 |
HIP 65353 |
18.03 |
| 2026-06-17 12:00 |
13:23:37.81 |
+22:47:11.8 |
HIP 65353 |
14.57 |
| 2026-06-18 00:00 |
13:23:32.19 |
+22:43:44.5 |
HIP 65353 |
11.23 |
| 2026-06-18 12:00 |
13:23:26.77 |
+22:40:16.4 |
HIP 65353 |
8.17 |
| 2026-06-19 00:00 |
13:23:21.56 |
+22:36:47.5 |
HIP 65353 |
5.84 |
| 2026-06-19 12:00 |
13:23:16.54 |
+22:33:17.6 |
HIP 65353 |
5.30 |
| 2026-06-20 00:00 |
13:23:11.72 |
+22:29:47.0 |
HIP 65353 |
6.98 |
| 2026-06-20 12:00 |
13:23:07.09 |
+22:26:15.5 |
HIP 65353 |
9.79 |
| 2026-06-21 00:00 |
13:23:02.66 |
+22:22:43.3 |
HIP 65353 |
13.03 |
| 2026-06-21 12:00 |
13:22:58.43 |
+22:19:10.2 |
HIP 65216 |
14.30 |
| 2026-06-22 00:00 |
13:22:54.40 |
+22:15:36.4 |
HIP 65216 |
13.71 |