| Parameter |
Value |
| Designation |
237P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-05-14T13:55:38.369280Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T10:11:19Z |
| Obs used |
2268 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
21.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2021-12-09.0000000 |
| e |
0.43436596 |
| q (au) |
1.986663 |
| a (au) |
3.512276 |
| i (deg) |
14.014625 |
| Ω (om, deg) |
245.378783 |
| ω (w, deg) |
25.235831 |
| M (ma, deg) |
281.901559 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.535 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.535 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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 |
| 2022-02-04 |
2023-05-14 |
+9.5015 |
-3.783 |
| 2023-05-14 |
2023-10-17 |
+15.2071 |
-5.277 |
| 2023-10-17 |
2024-11-21 |
+3.9569 |
-1.564 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
05:08:31.62 |
+19:12:17.3 |
HIP 23976 |
17.56 |
| 2026-05-12 12:00 |
05:08:57.32 |
+19:12:34.3 |
HIP 23976 |
15.44 |
| 2026-05-13 00:00 |
05:09:23.07 |
+19:12:51.0 |
HIP 23976 |
15.56 |
| 2026-05-13 12:00 |
05:09:48.87 |
+19:13:07.4 |
HIP 23976 |
17.90 |
| 2026-05-14 00:00 |
05:10:14.72 |
+19:13:23.5 |
HIP 23976 |
21.75 |
| 2026-05-14 12:00 |
05:10:40.61 |
+19:13:39.3 |
HIP 23976 |
26.47 |
| 2026-05-15 00:00 |
05:11:06.55 |
+19:13:54.8 |
HIP 23976 |
31.68 |
| 2026-05-15 12:00 |
05:11:32.53 |
+19:14:09.9 |
HIP 24284 |
30.51 |
| 2026-05-16 00:00 |
05:11:58.56 |
+19:14:24.8 |
HIP 24284 |
27.47 |
| 2026-05-16 12:00 |
05:12:24.63 |
+19:14:39.4 |
HIP 24284 |
25.58 |
| 2026-05-17 00:00 |
05:12:50.74 |
+19:14:53.6 |
HIP 24284 |
25.09 |
| 2026-05-17 12:00 |
05:13:16.89 |
+19:15:07.6 |
HIP 24284 |
26.10 |
| 2026-05-18 00:00 |
05:13:43.08 |
+19:15:21.2 |
HIP 24284 |
28.46 |
| 2026-05-18 12:00 |
05:14:09.32 |
+19:15:34.4 |
HIP 24574 |
30.33 |
| 2026-05-19 00:00 |
05:14:35.59 |
+19:15:47.4 |
HIP 24574 |
24.14 |
| 2026-05-19 12:00 |
05:15:01.89 |
+19:16:00.0 |
HIP 24574 |
17.93 |
| 2026-05-20 00:00 |
05:15:28.24 |
+19:16:12.3 |
HIP 24574 |
11.73 |
| 2026-05-20 12:00 |
05:15:54.62 |
+19:16:24.2 |
HIP 24574 |
5.57 |
| 2026-05-21 00:00 |
05:16:21.03 |
+19:16:35.9 |
HIP 24574 |
1.39 |
| 2026-05-21 12:00 |
05:16:47.48 |
+19:16:47.1 |
HIP 24615 |
1.35 |
| 2026-05-22 00:00 |
05:17:13.96 |
+19:16:58.1 |
HIP 24615 |
6.36 |
| 2026-05-22 12:00 |
05:17:40.47 |
+19:17:08.6 |
HIP 24615 |
12.55 |
| 2026-05-23 00:00 |
05:18:07.02 |
+19:17:18.9 |
HIP 24615 |
18.79 |
| 2026-05-23 12:00 |
05:18:33.60 |
+19:17:28.8 |
HIP 24615 |
25.05 |
| 2026-05-24 00:00 |
05:19:00.20 |
+19:17:38.3 |
HIP 24906 |
25.10 |
| 2026-05-24 12:00 |
05:19:26.84 |
+19:17:47.5 |
HIP 24906 |
20.81 |
| 2026-05-25 00:00 |
05:19:53.51 |
+19:17:56.3 |
HIP 24906 |
17.75 |
| 2026-05-25 12:00 |
05:20:20.20 |
+19:18:04.8 |
HIP 24906 |
16.62 |
| 2026-05-26 00:00 |
05:20:46.92 |
+19:18:12.9 |
HIP 24906 |
17.81 |
| 2026-05-26 12:00 |
05:21:13.67 |
+19:18:20.7 |
HIP 24906 |
20.92 |
| 2026-05-27 00:00 |
05:21:40.44 |
+19:18:28.1 |
HIP 25134 |
23.49 |
| 2026-05-27 12:00 |
05:22:07.24 |
+19:18:35.1 |
HIP 25134 |
20.04 |
| 2026-05-28 00:00 |
05:22:34.06 |
+19:18:41.8 |
HIP 25134 |
18.20 |
| 2026-05-28 12:00 |
05:23:00.91 |
+19:18:48.1 |
HIP 25134 |
18.47 |
| 2026-05-29 00:00 |
05:23:27.78 |
+19:18:54.0 |
HIP 25134 |
20.77 |
| 2026-05-29 12:00 |
05:23:54.68 |
+19:18:59.6 |
HIP 25134 |
24.53 |
| 2026-05-30 00:00 |
05:24:21.60 |
+19:19:04.7 |
HIP 25134 |
29.21 |
| 2026-05-30 12:00 |
05:24:48.53 |
+19:19:09.5 |
HIP 25134 |
34.43 |
| 2026-05-31 00:00 |
05:25:15.49 |
+19:19:14.0 |
HIP 25534 |
33.40 |
| 2026-05-31 12:00 |
05:25:42.47 |
+19:19:18.0 |
HIP 25534 |
27.04 |
| 2026-06-01 00:00 |
05:26:09.47 |
+19:19:21.7 |
HIP 25534 |
20.68 |
| 2026-06-01 12:00 |
05:26:36.49 |
+19:19:25.0 |
HIP 25534 |
14.32 |
| 2026-06-02 00:00 |
05:27:03.53 |
+19:19:27.9 |
HIP 25534 |
7.99 |