| Parameter |
Value |
| Designation |
230P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-11-18T01:34:10.223040Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T12:12:40Z |
| Obs used |
1528 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
5.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-07-24T08:25:25.536000Z |
| Discovery magnitude (MPC) |
21.80 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-07-08.0000000 |
| e |
0.56311389 |
| q (au) |
1.485293 |
| a (au) |
3.399726 |
| i (deg) |
14.653033 |
| Ω (om, deg) |
112.396470 |
| ω (w, deg) |
308.912952 |
| M (ma, deg) |
339.077991 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.855 + 2.038\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.855 |
| n |
2.038 |
| gf |
0.871 |
| gb |
-0.500 |
| k |
0.937 |
| δ90 |
3.114 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
17:02:46.71 |
-15:55:58.1 |
HIP 83479 |
13.40 |
| 2026-07-29 12:00 |
17:02:35.96 |
-15:56:52.5 |
HIP 83479 |
16.14 |
| 2026-07-30 00:00 |
17:02:25.41 |
-15:57:47.2 |
HIP 83479 |
18.83 |
| 2026-07-30 12:00 |
17:02:15.08 |
-15:58:42.3 |
HIP 83479 |
21.47 |
| 2026-07-31 00:00 |
17:02:04.95 |
-15:59:37.7 |
HIP 83479 |
24.08 |
| 2026-07-31 12:00 |
17:01:55.04 |
-16:00:33.5 |
HIP 83242 |
25.78 |
| 2026-08-01 00:00 |
17:01:45.34 |
-16:01:29.7 |
HIP 83242 |
25.12 |
| 2026-08-01 12:00 |
17:01:35.85 |
-16:02:26.3 |
HIP 83242 |
24.72 |
| 2026-08-02 00:00 |
17:01:26.57 |
-16:03:23.3 |
HIP 83242 |
24.59 |
| 2026-08-02 12:00 |
17:01:17.51 |
-16:04:20.6 |
HIP 83242 |
24.73 |
| 2026-08-03 00:00 |
17:01:08.67 |
-16:05:18.2 |
HIP 83242 |
25.10 |
| 2026-08-03 12:00 |
17:01:00.03 |
-16:06:16.2 |
HIP 83139 |
23.36 |
| 2026-08-04 00:00 |
17:00:51.62 |
-16:07:14.6 |
HIP 83139 |
21.49 |
| 2026-08-04 12:00 |
17:00:43.42 |
-16:08:13.3 |
HIP 83139 |
19.74 |
| 2026-08-05 00:00 |
17:00:35.44 |
-16:09:12.4 |
HIP 83139 |
18.14 |
| 2026-08-05 12:00 |
17:00:27.68 |
-16:10:11.9 |
HIP 83139 |
16.71 |
| 2026-08-06 00:00 |
17:00:20.14 |
-16:11:11.7 |
HIP 83139 |
15.50 |
| 2026-08-06 12:00 |
17:00:12.81 |
-16:12:11.8 |
HIP 83139 |
14.52 |
| 2026-08-07 00:00 |
17:00:05.71 |
-16:13:12.3 |
HIP 83139 |
13.82 |
| 2026-08-07 12:00 |
16:59:58.83 |
-16:14:13.1 |
HIP 83139 |
13.42 |
| 2026-08-08 00:00 |
16:59:52.17 |
-16:15:14.3 |
HIP 83139 |
13.33 |
| 2026-08-08 12:00 |
16:59:45.73 |
-16:16:15.8 |
HIP 83139 |
13.52 |
| 2026-08-09 00:00 |
16:59:39.52 |
-16:17:17.6 |
HIP 83139 |
13.99 |
| 2026-08-09 12:00 |
16:59:33.53 |
-16:18:19.8 |
HIP 83139 |
14.68 |
| 2026-08-10 00:00 |
16:59:27.76 |
-16:19:22.3 |
HIP 83139 |
15.55 |
| 2026-08-10 12:00 |
16:59:22.22 |
-16:20:25.1 |
HIP 83139 |
16.56 |
| 2026-08-11 00:00 |
16:59:16.90 |
-16:21:28.3 |
HIP 83139 |
17.68 |
| 2026-08-11 12:00 |
16:59:11.80 |
-16:22:31.7 |
HIP 83139 |
18.87 |
| 2026-08-12 00:00 |
16:59:06.94 |
-16:23:35.5 |
HIP 83139 |
20.12 |
| 2026-08-12 12:00 |
16:59:02.29 |
-16:24:39.6 |
HIP 83192 |
21.11 |
| 2026-08-13 00:00 |
16:58:57.88 |
-16:25:44.1 |
HIP 83192 |
21.24 |
| 2026-08-13 12:00 |
16:58:53.69 |
-16:26:48.8 |
HIP 83192 |
21.43 |
| 2026-08-14 00:00 |
16:58:49.73 |
-16:27:53.8 |
HIP 83192 |
21.66 |
| 2026-08-14 12:00 |
16:58:45.99 |
-16:28:59.1 |
HIP 83192 |
21.94 |
| 2026-08-15 00:00 |
16:58:42.48 |
-16:30:04.7 |
HIP 83192 |
22.25 |
| 2026-08-15 12:00 |
16:58:39.20 |
-16:31:10.7 |
HIP 83192 |
22.59 |
| 2026-08-16 00:00 |
16:58:36.14 |
-16:32:16.9 |
HIP 83192 |
22.94 |
| 2026-08-16 12:00 |
16:58:33.31 |
-16:33:23.3 |
HIP 83192 |
23.32 |
| 2026-08-17 00:00 |
16:58:30.71 |
-16:34:30.1 |
HIP 83131 |
22.74 |
| 2026-08-17 12:00 |
16:58:28.33 |
-16:35:37.1 |
HIP 83131 |
22.09 |
| 2026-08-18 00:00 |
16:58:26.18 |
-16:36:44.5 |
HIP 83131 |
21.45 |
| 2026-08-18 12:00 |
16:58:24.25 |
-16:37:52.0 |
HIP 83131 |
20.83 |
| 2026-08-19 00:00 |
16:58:22.55 |
-16:38:59.9 |
HIP 83131 |
20.23 |