메타데이터
| 항목 |
값 |
| Designation |
C/2019 M4 (TESS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-09-10T05:31:11.516160Z |
| Orbit solution date (soln_date, UTC) |
2023-05-11T17:42:03Z |
| Obs used |
88 |
| NEO |
- |
| M1 |
4.600 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-06-27T02:44:30.768000Z |
| Discovery magnitude (MPC) |
18.90 G |
| Discovery observatory (MPC) |
C57 · TESS |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-09-26.0000000 |
| e |
1.00453441 |
| q (au) |
9.181017 |
| a (au) |
-2024.743895 |
| i (deg) |
65.710801 |
| Ω (om, deg) |
52.573407 |
| ω (w, deg) |
260.252031 |
| M (ma, deg) |
0.000171 |
밝기
산란 + 전체 선형
$$
M_a = (-1.188 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-1.188 |
| n |
6.000 |
| gf |
0.976 |
| gb |
-0.774 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
03:22:50.21 |
+02:27:35.5 |
HIP 15732 |
2.08 |
| 2026-07-29 12:00 |
03:22:52.41 |
+02:27:42.4 |
HIP 15732 |
2.59 |
| 2026-07-30 00:00 |
03:22:54.57 |
+02:27:49.2 |
HIP 15732 |
3.11 |
| 2026-07-30 12:00 |
03:22:56.67 |
+02:27:55.6 |
HIP 15732 |
3.63 |
| 2026-07-31 00:00 |
03:22:58.71 |
+02:28:01.8 |
HIP 15732 |
4.13 |
| 2026-07-31 12:00 |
03:23:00.70 |
+02:28:07.7 |
HIP 15732 |
4.63 |
| 2026-08-01 00:00 |
03:23:02.64 |
+02:28:13.3 |
HIP 15732 |
5.11 |
| 2026-08-01 12:00 |
03:23:04.52 |
+02:28:18.7 |
HIP 15732 |
5.59 |
| 2026-08-02 00:00 |
03:23:06.34 |
+02:28:23.7 |
HIP 15732 |
6.05 |
| 2026-08-02 12:00 |
03:23:08.11 |
+02:28:28.6 |
HIP 15732 |
6.49 |
| 2026-08-03 00:00 |
03:23:09.83 |
+02:28:33.1 |
HIP 15732 |
6.92 |
| 2026-08-03 12:00 |
03:23:11.49 |
+02:28:37.4 |
HIP 15732 |
7.34 |
| 2026-08-04 00:00 |
03:23:13.09 |
+02:28:41.4 |
HIP 15732 |
7.75 |
| 2026-08-04 12:00 |
03:23:14.64 |
+02:28:45.2 |
HIP 15732 |
8.14 |
| 2026-08-05 00:00 |
03:23:16.14 |
+02:28:48.7 |
HIP 15732 |
8.51 |
| 2026-08-05 12:00 |
03:23:17.57 |
+02:28:51.9 |
HIP 15732 |
8.87 |
| 2026-08-06 00:00 |
03:23:18.95 |
+02:28:54.9 |
HIP 15732 |
9.22 |
| 2026-08-06 12:00 |
03:23:20.27 |
+02:28:57.6 |
HIP 15732 |
9.56 |
| 2026-08-07 00:00 |
03:23:21.54 |
+02:29:00.0 |
HIP 15732 |
9.87 |
| 2026-08-07 12:00 |
03:23:22.75 |
+02:29:02.2 |
HIP 15732 |
10.18 |
| 2026-08-08 00:00 |
03:23:23.90 |
+02:29:04.2 |
HIP 15732 |
10.47 |
| 2026-08-08 12:00 |
03:23:24.99 |
+02:29:05.9 |
HIP 15732 |
10.74 |
| 2026-08-09 00:00 |
03:23:26.03 |
+02:29:07.3 |
HIP 15732 |
11.00 |
| 2026-08-09 12:00 |
03:23:27.01 |
+02:29:08.5 |
HIP 15732 |
11.25 |
| 2026-08-10 00:00 |
03:23:27.93 |
+02:29:09.4 |
HIP 15732 |
11.48 |
| 2026-08-10 12:00 |
03:23:28.79 |
+02:29:10.1 |
HIP 15732 |
11.69 |
| 2026-08-11 00:00 |
03:23:29.60 |
+02:29:10.5 |
HIP 15732 |
11.89 |
| 2026-08-11 12:00 |
03:23:30.34 |
+02:29:10.7 |
HIP 15732 |
12.08 |
| 2026-08-12 00:00 |
03:23:31.03 |
+02:29:10.7 |
HIP 15732 |
12.25 |
| 2026-08-12 12:00 |
03:23:31.66 |
+02:29:10.4 |
HIP 15732 |
12.41 |
| 2026-08-13 00:00 |
03:23:32.23 |
+02:29:09.9 |
HIP 15732 |
12.55 |
| 2026-08-13 12:00 |
03:23:32.74 |
+02:29:09.1 |
HIP 15732 |
12.67 |
| 2026-08-14 00:00 |
03:23:33.19 |
+02:29:08.1 |
HIP 15732 |
12.79 |
| 2026-08-14 12:00 |
03:23:33.58 |
+02:29:06.9 |
HIP 15732 |
12.88 |
| 2026-08-15 00:00 |
03:23:33.92 |
+02:29:05.4 |
HIP 15732 |
12.96 |
| 2026-08-15 12:00 |
03:23:34.19 |
+02:29:03.7 |
HIP 15732 |
13.03 |
| 2026-08-16 00:00 |
03:23:34.41 |
+02:29:01.8 |
HIP 15732 |
13.08 |
| 2026-08-16 12:00 |
03:23:34.56 |
+02:28:59.6 |
HIP 15732 |
13.12 |
| 2026-08-17 00:00 |
03:23:34.66 |
+02:28:57.3 |
HIP 15732 |
13.14 |
| 2026-08-17 12:00 |
03:23:34.69 |
+02:28:54.7 |
HIP 15732 |
13.14 |
| 2026-08-18 00:00 |
03:23:34.67 |
+02:28:51.9 |
HIP 15732 |
13.13 |
| 2026-08-18 12:00 |
03:23:34.59 |
+02:28:48.8 |
HIP 15732 |
13.11 |
| 2026-08-19 00:00 |
03:23:34.44 |
+02:28:45.6 |
HIP 15732 |
13.07 |