| Parameter |
Value |
| Designation |
P/2004 FY140 (LINEAR) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2004-08-06T23:53:38.112000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:39Z |
| Obs used |
52 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2004-05-08.0000000 |
| e |
0.17089421 |
| q (au) |
4.106110 |
| a (au) |
4.952456 |
| i (deg) |
2.127781 |
| Ω (om, deg) |
327.293838 |
| ω (w, deg) |
239.757657 |
| M (ma, deg) |
351.862455 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-09-25 00:00 |
14:12:56.00 |
-15:13:07.2 |
HIP 69562 |
22.19 |
| 2026-09-25 12:00 |
14:13:28.27 |
-15:15:48.0 |
HIP 69562 |
13.97 |
| 2026-09-26 00:00 |
14:14:00.60 |
-15:18:28.9 |
HIP 69562 |
5.79 |
| 2026-09-26 12:00 |
14:14:33.01 |
-15:21:09.9 |
HIP 69562 |
2.78 |
| 2026-09-27 00:00 |
14:15:05.48 |
-15:23:50.9 |
HIP 69562 |
10.90 |
| 2026-09-27 12:00 |
14:15:38.01 |
-15:26:32.0 |
HIP 69562 |
19.16 |
| 2026-09-28 00:00 |
14:16:10.61 |
-15:29:13.1 |
HIP 69681 |
23.22 |
| 2026-09-28 12:00 |
14:16:43.27 |
-15:31:54.3 |
HIP 69681 |
28.47 |
| 2026-09-29 00:00 |
14:17:16.00 |
-15:34:35.5 |
HIP 69861 |
28.11 |
| 2026-09-29 12:00 |
14:17:48.80 |
-15:37:16.7 |
HIP 69861 |
24.27 |
| 2026-09-30 00:00 |
14:18:21.65 |
-15:39:58.0 |
HIP 69861 |
22.95 |
| 2026-09-30 12:00 |
14:18:54.57 |
-15:42:39.3 |
HIP 69861 |
24.59 |
| 2026-10-01 00:00 |
14:19:27.56 |
-15:45:20.6 |
HIP 69861 |
28.68 |
| 2026-10-01 12:00 |
14:20:00.60 |
-15:48:02.0 |
HIP 69861 |
34.37 |
| 2026-10-02 00:00 |
14:20:33.71 |
-15:50:43.4 |
HIP 70186 |
28.51 |
| 2026-10-02 12:00 |
14:21:06.88 |
-15:53:24.7 |
HIP 70186 |
22.77 |
| 2026-10-03 00:00 |
14:21:40.11 |
-15:56:06.1 |
HIP 70186 |
19.10 |
| 2026-10-03 12:00 |
14:22:13.40 |
-15:58:47.5 |
HIP 70186 |
18.81 |
| 2026-10-04 00:00 |
14:22:46.75 |
-16:01:28.8 |
HIP 70379 |
17.67 |
| 2026-10-04 12:00 |
14:23:20.16 |
-16:04:10.2 |
HIP 70379 |
9.23 |
| 2026-10-05 00:00 |
14:23:53.63 |
-16:06:51.6 |
HIP 70379 |
1.23 |
| 2026-10-05 12:00 |
14:24:27.16 |
-16:09:32.9 |
HIP 70379 |
7.86 |
| 2026-10-06 00:00 |
14:25:00.75 |
-16:12:14.2 |
HIP 70554 |
14.70 |
| 2026-10-06 12:00 |
14:25:34.39 |
-16:14:55.4 |
HIP 70554 |
6.25 |
| 2026-10-07 00:00 |
14:26:08.10 |
-16:17:36.7 |
HIP 70554 |
2.64 |
| 2026-10-07 12:00 |
14:26:41.86 |
-16:20:17.8 |
HIP 70554 |
10.97 |
| 2026-10-08 00:00 |
14:27:15.67 |
-16:22:59.0 |
HIP 70554 |
19.49 |
| 2026-10-08 12:00 |
14:27:49.54 |
-16:25:40.0 |
HIP 70756 |
19.82 |
| 2026-10-09 00:00 |
14:28:23.47 |
-16:28:21.1 |
HIP 70756 |
21.91 |
| 2026-10-09 12:00 |
14:28:57.45 |
-16:31:02.0 |
HIP 70756 |
26.73 |
| 2026-10-10 00:00 |
14:29:31.48 |
-16:33:42.9 |
HIP 70795 |
26.92 |
| 2026-10-10 12:00 |
14:30:05.57 |
-16:36:23.7 |
HIP 70795 |
29.39 |
| 2026-10-11 00:00 |
14:30:39.71 |
-16:39:04.4 |
HIP 71063 |
25.43 |
| 2026-10-11 12:00 |
14:31:13.90 |
-16:41:45.0 |
HIP 71063 |
22.56 |
| 2026-10-12 00:00 |
14:31:48.15 |
-16:44:25.6 |
HIP 71063 |
22.78 |
| 2026-10-12 12:00 |
14:32:22.44 |
-16:47:06.0 |
HIP 71234 |
24.34 |
| 2026-10-13 00:00 |
14:32:56.78 |
-16:49:46.3 |
HIP 71234 |
16.04 |
| 2026-10-13 12:00 |
14:33:31.18 |
-16:52:26.6 |
HIP 71234 |
8.45 |
| 2026-10-14 00:00 |
14:34:05.62 |
-16:55:06.7 |
HIP 71234 |
5.95 |
| 2026-10-14 12:00 |
14:34:40.11 |
-16:57:46.6 |
HIP 71234 |
12.23 |
| 2026-10-15 00:00 |
14:35:14.64 |
-17:00:26.5 |
HIP 71234 |
20.36 |
| 2026-10-15 12:00 |
14:35:49.23 |
-17:03:06.2 |
HIP 71234 |
28.82 |
| 2026-10-16 00:00 |
14:36:23.85 |
-17:05:45.8 |
HIP 71515 |
37.22 |