| 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) |
| 2026-05-12 00:00 |
19:49:34.21 |
-22:13:30.4 |
HIP 97718 |
28.64 |
| 2026-05-12 12:00 |
19:49:31.11 |
-22:13:50.9 |
HIP 97718 |
29.21 |
| 2026-05-13 00:00 |
19:49:27.80 |
-22:14:12.0 |
HIP 97718 |
29.83 |
| 2026-05-13 12:00 |
19:49:24.30 |
-22:14:33.5 |
HIP 97718 |
30.50 |
| 2026-05-14 00:00 |
19:49:20.60 |
-22:14:55.6 |
HIP 97718 |
31.23 |
| 2026-05-14 12:00 |
19:49:16.69 |
-22:15:18.1 |
HIP 97718 |
32.01 |
| 2026-05-15 00:00 |
19:49:12.59 |
-22:15:41.3 |
HIP 97718 |
32.84 |
| 2026-05-15 12:00 |
19:49:08.29 |
-22:16:04.9 |
HIP 97718 |
33.73 |
| 2026-05-16 00:00 |
19:49:03.79 |
-22:16:29.0 |
HIP 97383 |
34.40 |
| 2026-05-16 12:00 |
19:48:59.08 |
-22:16:53.7 |
HIP 97383 |
34.06 |
| 2026-05-17 00:00 |
19:48:54.18 |
-22:17:18.8 |
HIP 97383 |
33.73 |
| 2026-05-17 12:00 |
19:48:49.08 |
-22:17:44.5 |
HIP 97383 |
33.43 |
| 2026-05-18 00:00 |
19:48:43.78 |
-22:18:10.7 |
HIP 97383 |
33.15 |
| 2026-05-18 12:00 |
19:48:38.28 |
-22:18:37.3 |
HIP 97383 |
32.91 |
| 2026-05-19 00:00 |
19:48:32.58 |
-22:19:04.5 |
HIP 97383 |
32.71 |
| 2026-05-19 12:00 |
19:48:26.68 |
-22:19:32.2 |
HIP 97381 |
31.95 |
| 2026-05-20 00:00 |
19:48:20.58 |
-22:20:00.4 |
HIP 97381 |
30.95 |
| 2026-05-20 12:00 |
19:48:14.29 |
-22:20:29.0 |
HIP 97381 |
29.98 |
| 2026-05-21 00:00 |
19:48:07.80 |
-22:20:58.2 |
HIP 97381 |
29.03 |
| 2026-05-21 12:00 |
19:48:01.11 |
-22:21:27.8 |
HIP 97381 |
28.12 |
| 2026-05-22 00:00 |
19:47:54.22 |
-22:21:57.9 |
HIP 97381 |
27.26 |
| 2026-05-22 12:00 |
19:47:47.14 |
-22:22:28.5 |
HIP 97381 |
26.46 |
| 2026-05-23 00:00 |
19:47:39.87 |
-22:22:59.6 |
HIP 97381 |
25.74 |
| 2026-05-23 12:00 |
19:47:32.40 |
-22:23:31.1 |
HIP 97381 |
25.10 |
| 2026-05-24 00:00 |
19:47:24.74 |
-22:24:03.1 |
HIP 97381 |
24.59 |
| 2026-05-24 12:00 |
19:47:16.88 |
-22:24:35.5 |
HIP 97381 |
24.19 |
| 2026-05-25 00:00 |
19:47:08.83 |
-22:25:08.4 |
HIP 97381 |
23.95 |
| 2026-05-25 12:00 |
19:47:00.58 |
-22:25:41.8 |
HIP 97381 |
23.86 |
| 2026-05-26 00:00 |
19:46:52.15 |
-22:26:15.6 |
HIP 97381 |
23.95 |
| 2026-05-26 12:00 |
19:46:43.52 |
-22:26:49.8 |
HIP 97381 |
24.22 |
| 2026-05-27 00:00 |
19:46:34.71 |
-22:27:24.5 |
HIP 97381 |
24.67 |
| 2026-05-27 12:00 |
19:46:25.70 |
-22:27:59.6 |
HIP 97251 |
24.69 |
| 2026-05-28 00:00 |
19:46:16.50 |
-22:28:35.2 |
HIP 97251 |
24.75 |
| 2026-05-28 12:00 |
19:46:07.12 |
-22:29:11.1 |
HIP 97251 |
25.00 |
| 2026-05-29 00:00 |
19:45:57.54 |
-22:29:47.5 |
HIP 97251 |
25.46 |
| 2026-05-29 12:00 |
19:45:47.78 |
-22:30:24.3 |
HIP 97251 |
26.13 |
| 2026-05-30 00:00 |
19:45:37.84 |
-22:31:01.5 |
HIP 97138 |
25.28 |
| 2026-05-30 12:00 |
19:45:27.70 |
-22:31:39.1 |
HIP 97138 |
23.43 |
| 2026-05-31 00:00 |
19:45:17.39 |
-22:32:17.1 |
HIP 97138 |
21.68 |
| 2026-05-31 12:00 |
19:45:06.88 |
-22:32:55.5 |
HIP 97138 |
20.04 |
| 2026-06-01 00:00 |
19:44:56.20 |
-22:33:34.3 |
HIP 97138 |
18.59 |
| 2026-06-01 12:00 |
19:44:45.33 |
-22:34:13.4 |
HIP 97138 |
17.37 |
| 2026-06-02 00:00 |
19:44:34.28 |
-22:34:53.0 |
HIP 97138 |
16.47 |