P/2004 FY140 (LINEAR)
| 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) |
| 2026-02-03 00:00 |
13:38:49.63 |
-12:07:35.4 |
HIP 66617 |
7.19 |
| 2026-02-03 12:00 |
13:38:56.45 |
-12:08:34.3 |
HIP 66617 |
6.05 |
| 2026-02-04 00:00 |
13:39:03.04 |
-12:09:32.0 |
HIP 66617 |
5.40 |
| 2026-02-04 12:00 |
13:39:09.41 |
-12:10:28.4 |
HIP 66617 |
5.36 |
| 2026-02-05 00:00 |
13:39:15.55 |
-12:11:23.6 |
HIP 66617 |
5.90 |
| 2026-02-05 12:00 |
13:39:21.46 |
-12:12:17.5 |
HIP 66617 |
6.83 |
| 2026-02-06 00:00 |
13:39:27.15 |
-12:13:10.1 |
HIP 66617 |
7.98 |
| 2026-02-06 12:00 |
13:39:32.60 |
-12:14:01.5 |
HIP 66617 |
9.24 |
| 2026-02-07 00:00 |
13:39:37.83 |
-12:14:51.6 |
HIP 66617 |
10.54 |
| 2026-02-07 12:00 |
13:39:42.83 |
-12:15:40.4 |
HIP 66617 |
11.85 |
| 2026-02-08 00:00 |
13:39:47.59 |
-12:16:27.9 |
HIP 66617 |
13.14 |
| 2026-02-08 12:00 |
13:39:52.13 |
-12:17:14.2 |
HIP 66617 |
14.41 |
| 2026-02-09 00:00 |
13:39:56.43 |
-12:17:59.1 |
HIP 66617 |
15.63 |
| 2026-02-09 12:00 |
13:40:00.50 |
-12:18:42.7 |
HIP 66617 |
16.82 |
| 2026-02-10 00:00 |
13:40:04.33 |
-12:19:25.0 |
HIP 66617 |
17.95 |
| 2026-02-10 12:00 |
13:40:07.93 |
-12:20:06.0 |
HIP 66617 |
19.04 |
| 2026-02-11 00:00 |
13:40:11.29 |
-12:20:45.7 |
HIP 66617 |
20.08 |
| 2026-02-11 12:00 |
13:40:14.42 |
-12:21:24.1 |
HIP 66617 |
21.06 |
| 2026-02-12 00:00 |
13:40:17.31 |
-12:22:01.2 |
HIP 66617 |
21.99 |
| 2026-02-12 12:00 |
13:40:19.97 |
-12:22:36.9 |
HIP 66617 |
22.86 |
| 2026-02-13 00:00 |
13:40:22.39 |
-12:23:11.3 |
HIP 66617 |
23.69 |
| 2026-02-13 12:00 |
13:40:24.57 |
-12:23:44.4 |
HIP 66617 |
24.45 |
| 2026-02-14 00:00 |
13:40:26.51 |
-12:24:16.1 |
HIP 66758 |
24.11 |
| 2026-02-14 12:00 |
13:40:28.21 |
-12:24:46.5 |
HIP 66758 |
23.49 |
| 2026-02-15 00:00 |
13:40:29.67 |
-12:25:15.5 |
HIP 66758 |
22.92 |
| 2026-02-15 12:00 |
13:40:30.90 |
-12:25:43.2 |
HIP 66758 |
22.39 |
| 2026-02-16 00:00 |
13:40:31.88 |
-12:26:09.5 |
HIP 66758 |
21.89 |
| 2026-02-16 12:00 |
13:40:32.63 |
-12:26:34.5 |
HIP 66758 |
21.44 |
| 2026-02-17 00:00 |
13:40:33.14 |
-12:26:58.2 |
HIP 66758 |
21.03 |
| 2026-02-17 12:00 |
13:40:33.40 |
-12:27:20.5 |
HIP 66758 |
20.65 |
| 2026-02-18 00:00 |
13:40:33.43 |
-12:27:41.4 |
HIP 66758 |
20.32 |
| 2026-02-18 12:00 |
13:40:33.22 |
-12:28:01.0 |
HIP 66758 |
20.03 |
| 2026-02-19 00:00 |
13:40:32.76 |
-12:28:19.2 |
HIP 66758 |
19.78 |
| 2026-02-19 12:00 |
13:40:32.07 |
-12:28:36.0 |
HIP 66758 |
19.57 |
| 2026-02-20 00:00 |
13:40:31.14 |
-12:28:51.5 |
HIP 66758 |
19.41 |
| 2026-02-20 12:00 |
13:40:29.97 |
-12:29:05.7 |
HIP 66758 |
19.30 |
| 2026-02-21 00:00 |
13:40:28.56 |
-12:29:18.4 |
HIP 66758 |
19.23 |
| 2026-02-21 12:00 |
13:40:26.91 |
-12:29:29.8 |
HIP 66758 |
19.22 |
| 2026-02-22 00:00 |
13:40:25.02 |
-12:29:39.9 |
HIP 66758 |
19.27 |
| 2026-02-22 12:00 |
13:40:22.90 |
-12:29:48.6 |
HIP 66758 |
19.37 |
| 2026-02-23 00:00 |
13:40:20.54 |
-12:29:55.9 |
HIP 66758 |
19.54 |
| 2026-02-23 12:00 |
13:40:17.94 |
-12:30:01.9 |
HIP 66758 |
19.77 |
| 2026-02-24 00:00 |
13:40:15.11 |
-12:30:06.5 |
HIP 66758 |
20.07 |