C/1953 T1 (Abell)
| 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) |
| 2026-02-03 00:00 |
00:12:06.97 |
+03:36:37.7 |
HIP 900 |
34.89 |
| 2026-02-03 12:00 |
00:12:07.71 |
+03:36:42.1 |
HIP 900 |
34.91 |
| 2026-02-04 00:00 |
00:12:08.45 |
+03:36:46.6 |
HIP 900 |
34.92 |
| 2026-02-04 12:00 |
00:12:09.20 |
+03:36:51.2 |
HIP 900 |
34.94 |
| 2026-02-05 00:00 |
00:12:09.96 |
+03:36:55.7 |
HIP 900 |
34.96 |
| 2026-02-05 12:00 |
00:12:10.72 |
+03:37:00.4 |
HIP 900 |
34.98 |
| 2026-02-06 00:00 |
00:12:11.50 |
+03:37:05.0 |
HIP 900 |
35.00 |
| 2026-02-06 12:00 |
00:12:12.28 |
+03:37:09.8 |
HIP 900 |
35.02 |
| 2026-02-07 00:00 |
00:12:13.06 |
+03:37:14.6 |
HIP 900 |
35.04 |
| 2026-02-07 12:00 |
00:12:13.85 |
+03:37:19.4 |
HIP 900 |
35.07 |
| 2026-02-08 00:00 |
00:12:14.65 |
+03:37:24.3 |
HIP 900 |
35.09 |
| 2026-02-08 12:00 |
00:12:15.46 |
+03:37:29.2 |
HIP 900 |
35.12 |
| 2026-02-09 00:00 |
00:12:16.27 |
+03:37:34.2 |
HIP 900 |
35.15 |
| 2026-02-09 12:00 |
00:12:17.09 |
+03:37:39.2 |
HIP 900 |
35.18 |
| 2026-02-10 00:00 |
00:12:17.92 |
+03:37:44.3 |
HIP 900 |
35.21 |
| 2026-02-10 12:00 |
00:12:18.75 |
+03:37:49.4 |
HIP 900 |
35.25 |
| 2026-02-11 00:00 |
00:12:19.59 |
+03:37:54.6 |
HIP 900 |
35.28 |
| 2026-02-11 12:00 |
00:12:20.44 |
+03:37:59.8 |
HIP 900 |
35.32 |
| 2026-02-12 00:00 |
00:12:21.29 |
+03:38:05.0 |
HIP 900 |
35.36 |
| 2026-02-12 12:00 |
00:12:22.15 |
+03:38:10.4 |
HIP 900 |
35.40 |
| 2026-02-13 00:00 |
00:12:23.02 |
+03:38:15.7 |
HIP 900 |
35.44 |
| 2026-02-13 12:00 |
00:12:23.89 |
+03:38:21.1 |
HIP 900 |
35.48 |
| 2026-02-14 00:00 |
00:12:24.76 |
+03:38:26.5 |
HIP 900 |
35.53 |
| 2026-02-14 12:00 |
00:12:25.65 |
+03:38:32.0 |
HIP 900 |
35.58 |
| 2026-02-15 00:00 |
00:12:26.54 |
+03:38:37.6 |
HIP 900 |
35.63 |
| 2026-02-15 12:00 |
00:12:27.43 |
+03:38:43.1 |
HIP 900 |
35.68 |
| 2026-02-16 00:00 |
00:12:28.33 |
+03:38:48.7 |
HIP 900 |
35.73 |
| 2026-02-16 12:00 |
00:12:29.24 |
+03:38:54.4 |
HIP 900 |
35.78 |
| 2026-02-17 00:00 |
00:12:30.15 |
+03:39:00.1 |
HIP 900 |
35.84 |
| 2026-02-17 12:00 |
00:12:31.07 |
+03:39:05.8 |
HIP 900 |
35.90 |
| 2026-02-18 00:00 |
00:12:31.99 |
+03:39:11.6 |
HIP 900 |
35.96 |
| 2026-02-18 12:00 |
00:12:32.92 |
+03:39:17.4 |
HIP 900 |
36.02 |
| 2026-02-19 00:00 |
00:12:33.86 |
+03:39:23.3 |
HIP 900 |
36.08 |
| 2026-02-19 12:00 |
00:12:34.80 |
+03:39:29.2 |
HIP 900 |
36.15 |
| 2026-02-20 00:00 |
00:12:35.74 |
+03:39:35.1 |
HIP 1179 |
36.06 |
| 2026-02-20 12:00 |
00:12:36.69 |
+03:39:41.1 |
HIP 1179 |
35.90 |
| 2026-02-21 00:00 |
00:12:37.65 |
+03:39:47.1 |
HIP 1179 |
35.75 |
| 2026-02-21 12:00 |
00:12:38.61 |
+03:39:53.2 |
HIP 1179 |
35.59 |
| 2026-02-22 00:00 |
00:12:39.57 |
+03:39:59.3 |
HIP 1179 |
35.43 |
| 2026-02-22 12:00 |
00:12:40.54 |
+03:40:05.4 |
HIP 1179 |
35.28 |
| 2026-02-23 00:00 |
00:12:41.52 |
+03:40:11.6 |
HIP 1179 |
35.13 |
| 2026-02-23 12:00 |
00:12:42.49 |
+03:40:17.8 |
HIP 1179 |
34.97 |
| 2026-02-24 00:00 |
00:12:43.48 |
+03:40:24.0 |
HIP 1179 |
34.82 |