메타데이터
| 항목 |
값 |
| Designation |
C/2019 M3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-01-03T01:14:33.895680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:57Z |
| Obs used |
340 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
6.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-06-30T12:24:39.600000Z |
| Discovery magnitude (MPC) |
19.39 c |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-08-04.0000000 |
| e |
1.00221470 |
| q (au) |
2.417809 |
| a (au) |
-1091.709033 |
| i (deg) |
99.436295 |
| Ω (om, deg) |
154.896272 |
| ω (w, deg) |
87.935053 |
| M (ma, deg) |
0.005819 |
밝기
산란 + 전체 선형
$$
M_a = (13.222 + 2.205\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.222 |
| n |
2.205 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2019-06-30 |
2019-09-05 |
+4.9840 |
-2.533 |
| 2019-09-05 |
2020-11-22 |
-48.4696 |
+27.440 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
23:42:12.10 |
-52:31:39.6 |
HIP 116875 |
24.53 |
| 2026-05-12 12:00 |
23:42:17.69 |
-52:32:35.2 |
HIP 116875 |
25.68 |
| 2026-05-13 00:00 |
23:42:23.21 |
-52:33:31.4 |
HIP 116875 |
26.84 |
| 2026-05-13 12:00 |
23:42:28.68 |
-52:34:28.0 |
HIP 116875 |
28.01 |
| 2026-05-14 00:00 |
23:42:34.09 |
-52:35:25.1 |
HIP 116930 |
28.08 |
| 2026-05-14 12:00 |
23:42:39.44 |
-52:36:22.7 |
HIP 116981 |
27.11 |
| 2026-05-15 00:00 |
23:42:44.72 |
-52:37:20.9 |
HIP 116981 |
26.09 |
| 2026-05-15 12:00 |
23:42:49.95 |
-52:38:19.5 |
HIP 116981 |
25.08 |
| 2026-05-16 00:00 |
23:42:55.11 |
-52:39:18.6 |
HIP 116981 |
24.09 |
| 2026-05-16 12:00 |
23:43:00.21 |
-52:40:18.1 |
HIP 116981 |
23.12 |
| 2026-05-17 00:00 |
23:43:05.24 |
-52:41:18.2 |
HIP 116981 |
22.16 |
| 2026-05-17 12:00 |
23:43:10.22 |
-52:42:18.7 |
HIP 116981 |
21.23 |
| 2026-05-18 00:00 |
23:43:15.13 |
-52:43:19.8 |
HIP 116981 |
20.33 |
| 2026-05-18 12:00 |
23:43:19.98 |
-52:44:21.2 |
HIP 116981 |
19.45 |
| 2026-05-19 00:00 |
23:43:24.76 |
-52:45:23.2 |
HIP 116981 |
18.61 |
| 2026-05-19 12:00 |
23:43:29.48 |
-52:46:25.6 |
HIP 116981 |
17.81 |
| 2026-05-20 00:00 |
23:43:34.13 |
-52:47:28.5 |
HIP 116981 |
17.05 |
| 2026-05-20 12:00 |
23:43:38.72 |
-52:48:31.8 |
HIP 116981 |
16.34 |
| 2026-05-21 00:00 |
23:43:43.24 |
-52:49:35.6 |
HIP 116981 |
15.69 |
| 2026-05-21 12:00 |
23:43:47.70 |
-52:50:39.9 |
HIP 116981 |
15.11 |
| 2026-05-22 00:00 |
23:43:52.08 |
-52:51:44.6 |
HIP 116981 |
14.60 |
| 2026-05-22 12:00 |
23:43:56.41 |
-52:52:49.7 |
HIP 116981 |
14.17 |
| 2026-05-23 00:00 |
23:44:00.66 |
-52:53:55.3 |
HIP 116981 |
13.83 |
| 2026-05-23 12:00 |
23:44:04.85 |
-52:55:01.3 |
HIP 116981 |
13.59 |
| 2026-05-24 00:00 |
23:44:08.97 |
-52:56:07.7 |
HIP 116981 |
13.45 |
| 2026-05-24 12:00 |
23:44:13.03 |
-52:57:14.6 |
HIP 116981 |
13.42 |
| 2026-05-25 00:00 |
23:44:17.01 |
-52:58:21.9 |
HIP 116981 |
13.50 |
| 2026-05-25 12:00 |
23:44:20.93 |
-52:59:29.6 |
HIP 116981 |
13.68 |
| 2026-05-26 00:00 |
23:44:24.78 |
-53:00:37.8 |
HIP 116981 |
13.96 |
| 2026-05-26 12:00 |
23:44:28.56 |
-53:01:46.3 |
HIP 116981 |
14.34 |
| 2026-05-27 00:00 |
23:44:32.27 |
-53:02:55.2 |
HIP 116981 |
14.81 |
| 2026-05-27 12:00 |
23:44:35.91 |
-53:04:04.6 |
HIP 116981 |
15.36 |
| 2026-05-28 00:00 |
23:44:39.48 |
-53:05:14.4 |
HIP 116981 |
15.99 |
| 2026-05-28 12:00 |
23:44:42.98 |
-53:06:24.5 |
HIP 116981 |
16.68 |
| 2026-05-29 00:00 |
23:44:46.41 |
-53:07:35.1 |
HIP 117240 |
16.82 |
| 2026-05-29 12:00 |
23:44:49.77 |
-53:08:46.0 |
HIP 117240 |
15.78 |
| 2026-05-30 00:00 |
23:44:53.06 |
-53:09:57.4 |
HIP 117240 |
14.78 |
| 2026-05-30 12:00 |
23:44:56.28 |
-53:11:09.1 |
HIP 117240 |
13.85 |
| 2026-05-31 00:00 |
23:44:59.42 |
-53:12:21.2 |
HIP 117240 |
12.98 |
| 2026-05-31 12:00 |
23:45:02.50 |
-53:13:33.6 |
HIP 117240 |
12.19 |
| 2026-06-01 00:00 |
23:45:05.50 |
-53:14:46.5 |
HIP 117240 |
11.51 |
| 2026-06-01 12:00 |
23:45:08.43 |
-53:15:59.7 |
HIP 117240 |
10.95 |
| 2026-06-02 00:00 |
23:45:11.29 |
-53:17:13.3 |
HIP 117240 |
10.53 |