| Parameter |
Value |
| Designation |
C/1953 T1 (Abell) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1954-07-07T08:24:47.105280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
39 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1954-03-29.0000000 |
| e |
1.00081195 |
| q (au) |
0.970185 |
| a (au) |
-1194.882510 |
| i (deg) |
53.228291 |
| Ω (om, deg) |
3.030697 |
| ω (w, deg) |
194.382085 |
| M (ma, deg) |
-0.002395 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.346 + 3.354\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.346 |
| n |
3.354 |
| gf |
0.833 |
| gb |
-0.939 |
| k |
1.000 |
| δ90 |
9.991 |
| 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) |
| 2026-03-26 00:00 |
00:13:47.99 |
+03:47:24.3 |
HIP 1179 |
28.85 |
| 2026-03-26 12:00 |
00:13:49.10 |
+03:47:31.8 |
HIP 1179 |
28.83 |
| 2026-03-27 00:00 |
00:13:50.22 |
+03:47:39.2 |
HIP 1179 |
28.82 |
| 2026-03-27 12:00 |
00:13:51.33 |
+03:47:46.7 |
HIP 1179 |
28.81 |
| 2026-03-28 00:00 |
00:13:52.45 |
+03:47:54.2 |
HIP 1179 |
28.80 |
| 2026-03-28 12:00 |
00:13:53.56 |
+03:48:01.6 |
HIP 1179 |
28.80 |
| 2026-03-29 00:00 |
00:13:54.68 |
+03:48:09.1 |
HIP 1179 |
28.80 |
| 2026-03-29 12:00 |
00:13:55.79 |
+03:48:16.6 |
HIP 1179 |
28.80 |
| 2026-03-30 00:00 |
00:13:56.90 |
+03:48:24.0 |
HIP 1179 |
28.80 |
| 2026-03-30 12:00 |
00:13:58.01 |
+03:48:31.5 |
HIP 1179 |
28.81 |
| 2026-03-31 00:00 |
00:13:59.13 |
+03:48:39.0 |
HIP 1179 |
28.83 |
| 2026-03-31 12:00 |
00:14:00.23 |
+03:48:46.5 |
HIP 1179 |
28.84 |
| 2026-04-01 00:00 |
00:14:01.34 |
+03:48:53.9 |
HIP 1179 |
28.86 |
| 2026-04-01 12:00 |
00:14:02.45 |
+03:49:01.4 |
HIP 1179 |
28.88 |
| 2026-04-02 00:00 |
00:14:03.56 |
+03:49:08.9 |
HIP 1179 |
28.91 |
| 2026-04-02 12:00 |
00:14:04.66 |
+03:49:16.3 |
HIP 1179 |
28.94 |
| 2026-04-03 00:00 |
00:14:05.76 |
+03:49:23.8 |
HIP 1179 |
28.97 |
| 2026-04-03 12:00 |
00:14:06.86 |
+03:49:31.2 |
HIP 1179 |
29.00 |
| 2026-04-04 00:00 |
00:14:07.96 |
+03:49:38.7 |
HIP 1179 |
29.04 |
| 2026-04-04 12:00 |
00:14:09.06 |
+03:49:46.2 |
HIP 1179 |
29.08 |
| 2026-04-05 00:00 |
00:14:10.16 |
+03:49:53.6 |
HIP 1179 |
29.13 |
| 2026-04-05 12:00 |
00:14:11.25 |
+03:50:01.0 |
HIP 1179 |
29.18 |
| 2026-04-06 00:00 |
00:14:12.35 |
+03:50:08.5 |
HIP 1179 |
29.23 |
| 2026-04-06 12:00 |
00:14:13.44 |
+03:50:15.9 |
HIP 1179 |
29.28 |
| 2026-04-07 00:00 |
00:14:14.53 |
+03:50:23.3 |
HIP 1179 |
29.34 |
| 2026-04-07 12:00 |
00:14:15.61 |
+03:50:30.7 |
HIP 1179 |
29.40 |
| 2026-04-08 00:00 |
00:14:16.70 |
+03:50:38.1 |
HIP 1179 |
29.46 |
| 2026-04-08 12:00 |
00:14:17.78 |
+03:50:45.5 |
HIP 1179 |
29.52 |
| 2026-04-09 00:00 |
00:14:18.86 |
+03:50:52.9 |
HIP 1179 |
29.59 |
| 2026-04-09 12:00 |
00:14:19.94 |
+03:51:00.3 |
HIP 1179 |
29.66 |
| 2026-04-10 00:00 |
00:14:21.02 |
+03:51:07.7 |
HIP 1179 |
29.74 |
| 2026-04-10 12:00 |
00:14:22.09 |
+03:51:15.0 |
HIP 1179 |
29.81 |
| 2026-04-11 00:00 |
00:14:23.16 |
+03:51:22.4 |
HIP 1179 |
29.89 |
| 2026-04-11 12:00 |
00:14:24.23 |
+03:51:29.7 |
HIP 1179 |
29.97 |
| 2026-04-12 00:00 |
00:14:25.29 |
+03:51:37.0 |
HIP 1179 |
30.06 |
| 2026-04-12 12:00 |
00:14:26.35 |
+03:51:44.3 |
HIP 1179 |
30.14 |
| 2026-04-13 00:00 |
00:14:27.41 |
+03:51:51.6 |
HIP 1179 |
30.23 |
| 2026-04-13 12:00 |
00:14:28.47 |
+03:51:58.9 |
HIP 1179 |
30.32 |
| 2026-04-14 00:00 |
00:14:29.52 |
+03:52:06.2 |
HIP 1179 |
30.42 |
| 2026-04-14 12:00 |
00:14:30.57 |
+03:52:13.4 |
HIP 1179 |
30.51 |
| 2026-04-15 00:00 |
00:14:31.62 |
+03:52:20.7 |
HIP 1179 |
30.61 |
| 2026-04-15 12:00 |
00:14:32.66 |
+03:52:27.9 |
HIP 1179 |
30.71 |
| 2026-04-16 00:00 |
00:14:33.70 |
+03:52:35.1 |
HIP 1272 |
30.66 |