메타데이터
| 항목 |
값 |
| Designation |
C/2020 T4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-07-05T05:56:29.909760Z |
| Orbit solution date (soln_date, UTC) |
2021-07-01T22:12:53Z |
| Obs used |
171 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-10-15T14:08:31.113600Z |
| Discovery magnitude (MPC) |
21.00 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-11-23.0000000 |
| e |
1.00004087 |
| q (au) |
2.191878 |
| a (au) |
-53626.423966 |
| i (deg) |
83.817389 |
| Ω (om, deg) |
50.622331 |
| ω (w, deg) |
79.602529 |
| M (ma, deg) |
-0.000018 |
밝기
산란 + 전체 선형
$$
M_a = (14.969 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.969 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.849 |
| k |
0.999 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
14:23:10.35 |
-49:38:00.4 |
HIP 70337 |
13.35 |
| 2026-09-20 12:00 |
14:23:18.50 |
-49:37:57.3 |
HIP 70337 |
13.20 |
| 2026-09-21 00:00 |
14:23:26.71 |
-49:37:54.8 |
HIP 70337 |
13.17 |
| 2026-09-21 12:00 |
14:23:34.97 |
-49:37:52.9 |
HIP 70337 |
13.26 |
| 2026-09-22 00:00 |
14:23:43.28 |
-49:37:51.5 |
HIP 70337 |
13.48 |
| 2026-09-22 12:00 |
14:23:51.64 |
-49:37:50.7 |
HIP 70337 |
13.82 |
| 2026-09-23 00:00 |
14:24:00.05 |
-49:37:50.4 |
HIP 70337 |
14.28 |
| 2026-09-23 12:00 |
14:24:08.51 |
-49:37:50.7 |
HIP 70337 |
14.84 |
| 2026-09-24 00:00 |
14:24:17.03 |
-49:37:51.6 |
HIP 70337 |
15.50 |
| 2026-09-24 12:00 |
14:24:25.59 |
-49:37:53.0 |
HIP 70337 |
16.24 |
| 2026-09-25 00:00 |
14:24:34.19 |
-49:37:54.9 |
HIP 70337 |
17.06 |
| 2026-09-25 12:00 |
14:24:42.85 |
-49:37:57.5 |
HIP 70337 |
17.95 |
| 2026-09-26 00:00 |
14:24:51.55 |
-49:38:00.6 |
HIP 70597 |
16.78 |
| 2026-09-26 12:00 |
14:25:00.30 |
-49:38:04.2 |
HIP 70597 |
15.52 |
| 2026-09-27 00:00 |
14:25:09.10 |
-49:38:08.4 |
HIP 70597 |
14.28 |
| 2026-09-27 12:00 |
14:25:17.94 |
-49:38:13.2 |
HIP 70597 |
13.06 |
| 2026-09-28 00:00 |
14:25:26.82 |
-49:38:18.5 |
HIP 70597 |
11.87 |
| 2026-09-28 12:00 |
14:25:35.75 |
-49:38:24.4 |
HIP 70597 |
10.74 |
| 2026-09-29 00:00 |
14:25:44.73 |
-49:38:30.8 |
HIP 70597 |
9.68 |
| 2026-09-29 12:00 |
14:25:53.75 |
-49:38:37.8 |
HIP 70597 |
8.72 |
| 2026-09-30 00:00 |
14:26:02.81 |
-49:38:45.3 |
HIP 70597 |
7.91 |
| 2026-09-30 12:00 |
14:26:11.91 |
-49:38:53.4 |
HIP 70597 |
7.30 |
| 2026-10-01 00:00 |
14:26:21.06 |
-49:39:02.1 |
HIP 70597 |
6.94 |
| 2026-10-01 12:00 |
14:26:30.25 |
-49:39:11.2 |
HIP 70597 |
6.88 |
| 2026-10-02 00:00 |
14:26:39.47 |
-49:39:21.0 |
HIP 70597 |
7.14 |
| 2026-10-02 12:00 |
14:26:48.74 |
-49:39:31.3 |
HIP 70597 |
7.68 |
| 2026-10-03 00:00 |
14:26:58.05 |
-49:39:42.2 |
HIP 70597 |
8.45 |
| 2026-10-03 12:00 |
14:27:07.40 |
-49:39:53.6 |
HIP 70597 |
9.41 |
| 2026-10-04 00:00 |
14:27:16.79 |
-49:40:05.5 |
HIP 70597 |
10.50 |
| 2026-10-04 12:00 |
14:27:26.22 |
-49:40:18.0 |
HIP 70597 |
11.69 |
| 2026-10-05 00:00 |
14:27:35.68 |
-49:40:31.1 |
HIP 70597 |
12.96 |
| 2026-10-05 12:00 |
14:27:45.18 |
-49:40:44.7 |
HIP 70597 |
14.28 |
| 2026-10-06 00:00 |
14:27:54.72 |
-49:40:58.9 |
HIP 70767 |
14.59 |
| 2026-10-06 12:00 |
14:28:04.29 |
-49:41:13.6 |
HIP 70767 |
13.97 |
| 2026-10-07 00:00 |
14:28:13.90 |
-49:41:28.9 |
HIP 70767 |
13.49 |
| 2026-10-07 12:00 |
14:28:23.55 |
-49:41:44.7 |
HIP 70767 |
13.18 |
| 2026-10-08 00:00 |
14:28:33.23 |
-49:42:01.0 |
HIP 70767 |
13.05 |
| 2026-10-08 12:00 |
14:28:42.94 |
-49:42:17.9 |
HIP 70767 |
13.09 |
| 2026-10-09 00:00 |
14:28:52.69 |
-49:42:35.4 |
HIP 70767 |
13.33 |
| 2026-10-09 12:00 |
14:29:02.46 |
-49:42:53.4 |
HIP 70767 |
13.74 |
| 2026-10-10 00:00 |
14:29:12.27 |
-49:43:11.9 |
HIP 70767 |
14.32 |
| 2026-10-10 12:00 |
14:29:22.12 |
-49:43:31.0 |
HIP 70767 |
15.04 |
| 2026-10-11 00:00 |
14:29:31.99 |
-49:43:50.7 |
HIP 70931 |
14.98 |