메타데이터
| 항목 |
값 |
| Designation |
C/2019 T5 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-08-01T03:25:59.563200Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:42:54Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
14.900 |
| K1 |
9.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-10-08T14:44:47.270400Z |
| Discovery magnitude (MPC) |
18.99 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-11-03.0000000 |
| e |
0.80920592 |
| q (au) |
1.528889 |
| a (au) |
8.013295 |
| i (deg) |
33.422394 |
| Ω (om, deg) |
247.696368 |
| ω (w, deg) |
189.617261 |
| M (ma, deg) |
4.078062 |
밝기
산란 + 전체 선형
$$
M_a = (13.884 + 4.415\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.884 |
| n |
4.415 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.996 |
| 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 |
15:54:03.94 |
-22:00:51.0 |
HIP 77815 |
10.07 |
| 2026-09-20 12:00 |
15:54:09.32 |
-22:00:54.1 |
HIP 77815 |
11.29 |
| 2026-09-21 00:00 |
15:54:14.76 |
-22:00:57.4 |
HIP 77815 |
12.54 |
| 2026-09-21 12:00 |
15:54:20.27 |
-22:01:00.8 |
HIP 77815 |
13.80 |
| 2026-09-22 00:00 |
15:54:25.84 |
-22:01:04.5 |
HIP 77815 |
15.08 |
| 2026-09-22 12:00 |
15:54:31.47 |
-22:01:08.4 |
HIP 77815 |
16.37 |
| 2026-09-23 00:00 |
15:54:37.17 |
-22:01:12.4 |
HIP 77815 |
17.68 |
| 2026-09-23 12:00 |
15:54:42.92 |
-22:01:16.7 |
HIP 77815 |
19.01 |
| 2026-09-24 00:00 |
15:54:48.74 |
-22:01:21.2 |
HIP 77815 |
20.36 |
| 2026-09-24 12:00 |
15:54:54.62 |
-22:01:25.8 |
HIP 77815 |
21.71 |
| 2026-09-25 00:00 |
15:55:00.55 |
-22:01:30.7 |
HIP 77815 |
23.09 |
| 2026-09-25 12:00 |
15:55:06.55 |
-22:01:35.8 |
HIP 77815 |
24.48 |
| 2026-09-26 00:00 |
15:55:12.61 |
-22:01:41.0 |
HIP 78103 |
25.57 |
| 2026-09-26 12:00 |
15:55:18.73 |
-22:01:46.4 |
HIP 78103 |
24.27 |
| 2026-09-27 00:00 |
15:55:24.90 |
-22:01:52.1 |
HIP 78103 |
22.97 |
| 2026-09-27 12:00 |
15:55:31.14 |
-22:01:57.9 |
HIP 78103 |
21.68 |
| 2026-09-28 00:00 |
15:55:37.43 |
-22:02:03.9 |
HIP 78103 |
20.39 |
| 2026-09-28 12:00 |
15:55:43.78 |
-22:02:10.1 |
HIP 78103 |
19.11 |
| 2026-09-29 00:00 |
15:55:50.18 |
-22:02:16.5 |
HIP 78103 |
17.86 |
| 2026-09-29 12:00 |
15:55:56.65 |
-22:02:23.0 |
HIP 78103 |
16.63 |
| 2026-09-30 00:00 |
15:56:03.17 |
-22:02:29.8 |
HIP 78103 |
15.43 |
| 2026-09-30 12:00 |
15:56:09.75 |
-22:02:36.7 |
HIP 78103 |
14.29 |
| 2026-10-01 00:00 |
15:56:16.38 |
-22:02:43.8 |
HIP 78103 |
13.21 |
| 2026-10-01 12:00 |
15:56:23.07 |
-22:02:51.0 |
HIP 78103 |
12.22 |
| 2026-10-02 00:00 |
15:56:29.82 |
-22:02:58.5 |
HIP 78103 |
11.36 |
| 2026-10-02 12:00 |
15:56:36.62 |
-22:03:06.1 |
HIP 78103 |
10.64 |
| 2026-10-03 00:00 |
15:56:43.47 |
-22:03:13.9 |
HIP 78103 |
10.12 |
| 2026-10-03 12:00 |
15:56:50.38 |
-22:03:21.9 |
HIP 78103 |
9.83 |
| 2026-10-04 00:00 |
15:56:57.34 |
-22:03:30.0 |
HIP 78103 |
9.80 |
| 2026-10-04 12:00 |
15:57:04.36 |
-22:03:38.3 |
HIP 78103 |
10.03 |
| 2026-10-05 00:00 |
15:57:11.43 |
-22:03:46.8 |
HIP 78103 |
10.52 |
| 2026-10-05 12:00 |
15:57:18.55 |
-22:03:55.5 |
HIP 78103 |
11.23 |
| 2026-10-06 00:00 |
15:57:25.73 |
-22:04:04.3 |
HIP 78103 |
12.13 |
| 2026-10-06 12:00 |
15:57:32.95 |
-22:04:13.2 |
HIP 78103 |
13.19 |
| 2026-10-07 00:00 |
15:57:40.23 |
-22:04:22.4 |
HIP 78103 |
14.38 |
| 2026-10-07 12:00 |
15:57:47.56 |
-22:04:31.6 |
HIP 78103 |
15.67 |
| 2026-10-08 00:00 |
15:57:54.94 |
-22:04:41.1 |
HIP 78103 |
17.04 |
| 2026-10-08 12:00 |
15:58:02.37 |
-22:04:50.7 |
HIP 78103 |
18.48 |
| 2026-10-09 00:00 |
15:58:09.85 |
-22:05:00.4 |
HIP 78103 |
19.97 |
| 2026-10-09 12:00 |
15:58:17.38 |
-22:05:10.4 |
HIP 78103 |
21.51 |
| 2026-10-10 00:00 |
15:58:24.96 |
-22:05:20.4 |
HIP 78103 |
23.09 |
| 2026-10-10 12:00 |
15:58:32.59 |
-22:05:30.6 |
HIP 78103 |
24.70 |
| 2026-10-11 00:00 |
15:58:40.27 |
-22:05:41.0 |
HIP 78103 |
26.35 |