148P/Anderson-LINEAR
| Parameter |
Value |
| Designation |
148P/Anderson-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-06-13T16:15:58.455360Z |
| Orbit solution date (soln_date, UTC) |
2024-05-15T12:05:54Z |
| Obs used |
250 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
14.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-11-05.0000000 |
| e |
0.53932159 |
| q (au) |
1.694251 |
| a (au) |
3.677730 |
| i (deg) |
3.682208 |
| Ω (om, deg) |
89.790123 |
| ω (w, deg) |
6.596200 |
| M (ma, deg) |
227.148123 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.853 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.853 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.923 |
| 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) |
| 2026-02-03 00:00 |
19:07:59.98 |
-23:09:52.9 |
HIP 94041 |
10.34 |
| 2026-02-03 12:00 |
19:08:23.42 |
-23:09:21.3 |
HIP 94041 |
5.25 |
| 2026-02-04 00:00 |
19:08:46.80 |
-23:08:49.6 |
HIP 94041 |
2.64 |
| 2026-02-04 12:00 |
19:09:10.13 |
-23:08:17.7 |
HIP 94122 |
6.47 |
| 2026-02-05 00:00 |
19:09:33.40 |
-23:07:45.8 |
HIP 94122 |
3.71 |
| 2026-02-05 12:00 |
19:09:56.61 |
-23:07:13.8 |
HIP 94122 |
6.57 |
| 2026-02-06 00:00 |
19:10:19.76 |
-23:06:41.7 |
HIP 94122 |
11.40 |
| 2026-02-06 12:00 |
19:10:42.85 |
-23:06:09.5 |
HIP 94122 |
16.54 |
| 2026-02-07 00:00 |
19:11:05.88 |
-23:05:37.3 |
HIP 94122 |
21.76 |
| 2026-02-07 12:00 |
19:11:28.85 |
-23:05:04.9 |
HIP 94122 |
27.00 |
| 2026-02-08 00:00 |
19:11:51.76 |
-23:04:32.5 |
HIP 94494 |
30.32 |
| 2026-02-08 12:00 |
19:12:14.60 |
-23:04:00.1 |
HIP 94494 |
25.14 |
| 2026-02-09 00:00 |
19:12:37.38 |
-23:03:27.5 |
HIP 94494 |
20.04 |
| 2026-02-09 12:00 |
19:13:00.10 |
-23:02:54.9 |
HIP 94494 |
15.07 |
| 2026-02-10 00:00 |
19:13:22.75 |
-23:02:22.2 |
HIP 94494 |
10.38 |
| 2026-02-10 12:00 |
19:13:45.33 |
-23:01:49.5 |
HIP 94494 |
6.60 |
| 2026-02-11 00:00 |
19:14:07.84 |
-23:01:16.7 |
HIP 94494 |
5.82 |
| 2026-02-11 12:00 |
19:14:30.29 |
-23:00:43.9 |
HIP 94494 |
8.85 |
| 2026-02-12 00:00 |
19:14:52.67 |
-23:00:11.0 |
HIP 94494 |
13.28 |
| 2026-02-12 12:00 |
19:15:14.98 |
-22:59:38.1 |
HIP 94494 |
18.09 |
| 2026-02-13 00:00 |
19:15:37.21 |
-22:59:05.1 |
HIP 94754 |
22.13 |
| 2026-02-13 12:00 |
19:15:59.38 |
-22:58:32.1 |
HIP 94754 |
18.93 |
| 2026-02-14 00:00 |
19:16:21.47 |
-22:57:59.0 |
HIP 94754 |
16.72 |
| 2026-02-14 12:00 |
19:16:43.49 |
-22:57:26.0 |
HIP 94821 |
13.10 |
| 2026-02-15 00:00 |
19:17:05.43 |
-22:56:52.9 |
HIP 94821 |
8.06 |
| 2026-02-15 12:00 |
19:17:27.30 |
-22:56:19.8 |
HIP 94821 |
3.16 |
| 2026-02-16 00:00 |
19:17:49.09 |
-22:55:46.7 |
HIP 94821 |
2.50 |
| 2026-02-16 12:00 |
19:18:10.80 |
-22:55:13.5 |
HIP 94821 |
7.30 |
| 2026-02-17 00:00 |
19:18:32.44 |
-22:54:40.4 |
HIP 94821 |
12.26 |
| 2026-02-17 12:00 |
19:18:53.99 |
-22:54:07.2 |
HIP 94821 |
17.24 |
| 2026-02-18 00:00 |
19:19:15.47 |
-22:53:34.1 |
HIP 95084 |
22.10 |
| 2026-02-18 12:00 |
19:19:36.87 |
-22:53:00.9 |
HIP 95084 |
18.12 |
| 2026-02-19 00:00 |
19:19:58.18 |
-22:52:27.8 |
HIP 95084 |
14.76 |
| 2026-02-19 12:00 |
19:20:19.41 |
-22:51:54.6 |
HIP 95084 |
12.51 |
| 2026-02-20 00:00 |
19:20:40.56 |
-22:51:21.5 |
HIP 95084 |
11.97 |
| 2026-02-20 12:00 |
19:21:01.62 |
-22:50:48.4 |
HIP 95084 |
13.34 |
| 2026-02-21 00:00 |
19:21:22.59 |
-22:50:15.4 |
HIP 95084 |
16.12 |
| 2026-02-21 12:00 |
19:21:43.48 |
-22:49:42.3 |
HIP 95084 |
19.70 |
| 2026-02-22 00:00 |
19:22:04.29 |
-22:49:09.3 |
HIP 95084 |
23.73 |
| 2026-02-22 12:00 |
19:22:25.00 |
-22:48:36.3 |
HIP 95084 |
27.98 |
| 2026-02-23 00:00 |
19:22:45.63 |
-22:48:03.4 |
HIP 95084 |
32.38 |
| 2026-02-23 12:00 |
19:23:06.16 |
-22:47:30.5 |
HIP 95415 |
30.57 |
| 2026-02-24 00:00 |
19:23:26.61 |
-22:46:57.6 |
HIP 95457 |
27.70 |