| Parameter |
Value |
| Designation |
492P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-10-19T14:24:35.294400Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:43:24Z |
| Obs used |
802 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
9.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-18T11:25:10.848000Z |
| Discovery magnitude (MPC) |
19.90 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-12-01.0000000 |
| e |
0.69164881 |
| q (au) |
1.771711 |
| a (au) |
5.745757 |
| i (deg) |
11.457418 |
| Ω (om, deg) |
11.488927 |
| ω (w, deg) |
41.023047 |
| M (ma, deg) |
81.466296 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.416 + 4.211\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.416 |
| n |
4.211 |
| gf |
0.999 |
| gb |
-1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:30:26.13 |
-03:02:54.3 |
HIP 60956 |
20.12 |
| 2026-09-20 12:00 |
12:30:45.02 |
-03:05:10.8 |
HIP 60956 |
21.37 |
| 2026-09-21 00:00 |
12:31:03.91 |
-03:07:27.3 |
HIP 60956 |
23.74 |
| 2026-09-21 12:00 |
12:31:22.81 |
-03:09:43.8 |
HIP 60956 |
26.92 |
| 2026-09-22 00:00 |
12:31:41.72 |
-03:12:00.3 |
HIP 60956 |
30.68 |
| 2026-09-22 12:00 |
12:32:00.63 |
-03:14:16.8 |
HIP 61139 |
28.90 |
| 2026-09-23 00:00 |
12:32:19.55 |
-03:16:33.2 |
HIP 61139 |
27.88 |
| 2026-09-23 12:00 |
12:32:38.47 |
-03:18:49.6 |
HIP 61139 |
27.84 |
| 2026-09-24 00:00 |
12:32:57.39 |
-03:21:05.9 |
HIP 61139 |
28.76 |
| 2026-09-24 12:00 |
12:33:16.31 |
-03:23:22.2 |
HIP 61349 |
24.45 |
| 2026-09-25 00:00 |
12:33:35.24 |
-03:25:38.5 |
HIP 61349 |
20.01 |
| 2026-09-25 12:00 |
12:33:54.16 |
-03:27:54.7 |
HIP 61349 |
16.07 |
| 2026-09-26 00:00 |
12:34:13.09 |
-03:30:10.9 |
HIP 61349 |
13.08 |
| 2026-09-26 12:00 |
12:34:32.02 |
-03:32:27.0 |
HIP 61349 |
11.78 |
| 2026-09-27 00:00 |
12:34:50.94 |
-03:34:43.1 |
HIP 61441 |
9.36 |
| 2026-09-27 12:00 |
12:35:09.87 |
-03:36:59.1 |
HIP 61441 |
6.12 |
| 2026-09-28 00:00 |
12:35:28.79 |
-03:39:15.0 |
HIP 61441 |
6.50 |
| 2026-09-28 12:00 |
12:35:47.72 |
-03:41:30.9 |
HIP 61441 |
10.09 |
| 2026-09-29 00:00 |
12:36:06.64 |
-03:43:46.7 |
HIP 61441 |
14.70 |
| 2026-09-29 12:00 |
12:36:25.55 |
-03:46:02.5 |
HIP 61441 |
19.63 |
| 2026-09-30 00:00 |
12:36:44.47 |
-03:48:18.1 |
HIP 61608 |
18.22 |
| 2026-09-30 12:00 |
12:37:03.38 |
-03:50:33.7 |
HIP 61608 |
17.63 |
| 2026-10-01 00:00 |
12:37:22.28 |
-03:52:49.3 |
HIP 61608 |
18.56 |
| 2026-10-01 12:00 |
12:37:41.19 |
-03:55:04.7 |
HIP 61608 |
20.80 |
| 2026-10-02 00:00 |
12:38:00.08 |
-03:57:20.0 |
HIP 61608 |
23.99 |
| 2026-10-02 12:00 |
12:38:18.97 |
-03:59:35.3 |
HIP 61685 |
23.62 |
| 2026-10-03 00:00 |
12:38:37.86 |
-04:01:50.5 |
HIP 61685 |
20.62 |
| 2026-10-03 12:00 |
12:38:56.73 |
-04:04:05.6 |
HIP 61685 |
18.62 |
| 2026-10-04 00:00 |
12:39:15.60 |
-04:06:20.5 |
HIP 61685 |
17.97 |
| 2026-10-04 12:00 |
12:39:34.46 |
-04:08:35.4 |
HIP 61685 |
18.80 |
| 2026-10-05 00:00 |
12:39:53.31 |
-04:10:50.2 |
HIP 61685 |
20.93 |
| 2026-10-05 12:00 |
12:40:12.16 |
-04:13:04.8 |
HIP 61921 |
22.80 |
| 2026-10-06 00:00 |
12:40:30.99 |
-04:15:19.4 |
HIP 61921 |
20.83 |
| 2026-10-06 12:00 |
12:40:49.81 |
-04:17:33.8 |
HIP 61921 |
20.07 |
| 2026-10-07 00:00 |
12:41:08.62 |
-04:19:48.1 |
HIP 61921 |
20.62 |
| 2026-10-07 12:00 |
12:41:27.42 |
-04:22:02.2 |
HIP 61921 |
22.40 |
| 2026-10-08 00:00 |
12:41:46.21 |
-04:24:16.3 |
HIP 61894 |
23.92 |
| 2026-10-08 12:00 |
12:42:04.98 |
-04:26:30.2 |
HIP 61894 |
24.69 |
| 2026-10-09 00:00 |
12:42:23.74 |
-04:28:43.9 |
HIP 61894 |
26.48 |
| 2026-10-09 12:00 |
12:42:42.48 |
-04:30:57.5 |
HIP 62039 |
28.34 |
| 2026-10-10 00:00 |
12:43:01.21 |
-04:33:11.0 |
HIP 62039 |
30.25 |
| 2026-10-10 12:00 |
12:43:19.93 |
-04:35:24.3 |
HIP 62039 |
32.87 |
| 2026-10-11 00:00 |
12:43:38.62 |
-04:37:37.5 |
HIP 62260 |
30.34 |