메타데이터
| 항목 |
값 |
| Designation |
C/2019 C1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-05-05T17:23:03.788160Z |
| Orbit solution date (soln_date, UTC) |
2021-08-06T00:42:31Z |
| Obs used |
739 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-02-05T11:02:21.926400Z |
| Discovery magnitude (MPC) |
17.75 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-04-24.0000000 |
| e |
0.99209888 |
| q (au) |
6.581320 |
| a (au) |
832.959952 |
| i (deg) |
36.016489 |
| Ω (om, deg) |
212.397225 |
| ω (w, deg) |
319.189707 |
| M (ma, deg) |
359.999519 |
밝기
산란 + 전체 선형
$$
M_a = (0.402 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
0.402 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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) |
| 2026-03-26 00:00 |
17:44:58.60 |
+05:44:17.1 |
HIP 86805 |
10.76 |
| 2026-03-26 12:00 |
17:44:59.27 |
+05:45:27.1 |
HIP 86805 |
11.13 |
| 2026-03-27 00:00 |
17:44:59.87 |
+05:46:37.0 |
HIP 86805 |
11.60 |
| 2026-03-27 12:00 |
17:45:00.41 |
+05:47:47.0 |
HIP 86805 |
12.15 |
| 2026-03-28 00:00 |
17:45:00.87 |
+05:48:57.0 |
HIP 86805 |
12.77 |
| 2026-03-28 12:00 |
17:45:01.26 |
+05:50:06.9 |
HIP 86805 |
13.45 |
| 2026-03-29 00:00 |
17:45:01.59 |
+05:51:16.8 |
HIP 86805 |
14.18 |
| 2026-03-29 12:00 |
17:45:01.84 |
+05:52:26.7 |
HIP 86805 |
14.95 |
| 2026-03-30 00:00 |
17:45:02.02 |
+05:53:36.5 |
HIP 86805 |
15.75 |
| 2026-03-30 12:00 |
17:45:02.14 |
+05:54:46.3 |
HIP 86805 |
16.59 |
| 2026-03-31 00:00 |
17:45:02.18 |
+05:55:56.0 |
HIP 86805 |
17.45 |
| 2026-03-31 12:00 |
17:45:02.16 |
+05:57:05.7 |
HIP 86805 |
18.33 |
| 2026-04-01 00:00 |
17:45:02.07 |
+05:58:15.3 |
HIP 86805 |
19.23 |
| 2026-04-01 12:00 |
17:45:01.91 |
+05:59:24.9 |
HIP 86805 |
20.15 |
| 2026-04-02 00:00 |
17:45:01.68 |
+06:00:34.4 |
HIP 86805 |
21.08 |
| 2026-04-02 12:00 |
17:45:01.38 |
+06:01:43.9 |
HIP 86805 |
22.02 |
| 2026-04-03 00:00 |
17:45:01.01 |
+06:02:53.2 |
HIP 86805 |
22.98 |
| 2026-04-03 12:00 |
17:45:00.57 |
+06:04:02.5 |
HIP 86805 |
23.94 |
| 2026-04-04 00:00 |
17:45:00.06 |
+06:05:11.7 |
HIP 86977 |
23.75 |
| 2026-04-04 12:00 |
17:44:59.49 |
+06:06:20.9 |
HIP 86977 |
23.48 |
| 2026-04-05 00:00 |
17:44:58.85 |
+06:07:29.9 |
HIP 86977 |
23.28 |
| 2026-04-05 12:00 |
17:44:58.13 |
+06:08:38.8 |
HIP 86977 |
23.15 |
| 2026-04-06 00:00 |
17:44:57.35 |
+06:09:47.7 |
HIP 86977 |
23.09 |
| 2026-04-06 12:00 |
17:44:56.51 |
+06:10:56.4 |
HIP 86977 |
23.11 |
| 2026-04-07 00:00 |
17:44:55.59 |
+06:12:05.0 |
HIP 86977 |
23.21 |
| 2026-04-07 12:00 |
17:44:54.61 |
+06:13:13.5 |
HIP 86977 |
23.38 |
| 2026-04-08 00:00 |
17:44:53.56 |
+06:14:21.9 |
HIP 86977 |
23.62 |
| 2026-04-08 12:00 |
17:44:52.44 |
+06:15:30.2 |
HIP 86977 |
23.94 |
| 2026-04-09 00:00 |
17:44:51.25 |
+06:16:38.3 |
HIP 86977 |
24.32 |
| 2026-04-09 12:00 |
17:44:50.00 |
+06:17:46.3 |
HIP 86977 |
24.77 |
| 2026-04-10 00:00 |
17:44:48.68 |
+06:18:54.2 |
HIP 86977 |
25.28 |
| 2026-04-10 12:00 |
17:44:47.29 |
+06:20:01.9 |
HIP 86977 |
25.86 |
| 2026-04-11 00:00 |
17:44:45.84 |
+06:21:09.5 |
HIP 86977 |
26.48 |
| 2026-04-11 12:00 |
17:44:44.32 |
+06:22:16.9 |
HIP 86977 |
27.16 |
| 2026-04-12 00:00 |
17:44:42.73 |
+06:23:24.2 |
HIP 86977 |
27.89 |
| 2026-04-12 12:00 |
17:44:41.07 |
+06:24:31.3 |
HIP 86977 |
28.67 |
| 2026-04-13 00:00 |
17:44:39.35 |
+06:25:38.3 |
HIP 86977 |
29.48 |
| 2026-04-13 12:00 |
17:44:37.57 |
+06:26:45.0 |
HIP 86891 |
28.83 |
| 2026-04-14 00:00 |
17:44:35.72 |
+06:27:51.6 |
HIP 86891 |
27.94 |
| 2026-04-14 12:00 |
17:44:33.80 |
+06:28:58.0 |
HIP 86891 |
27.09 |
| 2026-04-15 00:00 |
17:44:31.82 |
+06:30:04.3 |
HIP 86891 |
26.27 |
| 2026-04-15 12:00 |
17:44:29.77 |
+06:31:10.3 |
HIP 86891 |
25.49 |
| 2026-04-16 00:00 |
17:44:27.66 |
+06:32:16.1 |
HIP 86891 |
24.76 |