C/2018 V2 (ATLAS)
메타데이터
| 항목 |
값 |
| Designation |
C/2018 V2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-11-26T23:28:47.184960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:46Z |
| Obs used |
173 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
12.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-11-02T12:38:26.880000Z |
| Discovery magnitude (MPC) |
19.10 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-03-18.0000000 |
| e |
0.90288516 |
| q (au) |
2.474837 |
| a (au) |
25.483616 |
| i (deg) |
159.109919 |
| Ω (om, deg) |
356.790851 |
| ω (w, deg) |
318.662491 |
| M (ma, deg) |
0.850590 |
밝기
산란 + 전체 선형
$$
M_a = (12.246 + 5.480\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.246 |
| n |
5.480 |
| gf |
1.000 |
| gb |
-0.951 |
| 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) |
| 2026-02-03 00:00 |
17:11:35.46 |
-03:09:13.3 |
HIP 84116 |
12.13 |
| 2026-02-03 12:00 |
17:11:38.48 |
-03:08:48.6 |
HIP 84116 |
12.35 |
| 2026-02-04 00:00 |
17:11:41.46 |
-03:08:23.7 |
HIP 84116 |
12.63 |
| 2026-02-04 12:00 |
17:11:44.39 |
-03:07:58.5 |
HIP 84116 |
12.97 |
| 2026-02-05 00:00 |
17:11:47.27 |
-03:07:33.1 |
HIP 84116 |
13.36 |
| 2026-02-05 12:00 |
17:11:50.11 |
-03:07:07.5 |
HIP 84116 |
13.79 |
| 2026-02-06 00:00 |
17:11:52.89 |
-03:06:41.6 |
HIP 84116 |
14.26 |
| 2026-02-06 12:00 |
17:11:55.63 |
-03:06:15.4 |
HIP 84116 |
14.76 |
| 2026-02-07 00:00 |
17:11:58.31 |
-03:05:49.0 |
HIP 84116 |
15.29 |
| 2026-02-07 12:00 |
17:12:00.95 |
-03:05:22.4 |
HIP 84116 |
15.84 |
| 2026-02-08 00:00 |
17:12:03.53 |
-03:04:55.6 |
HIP 84116 |
16.42 |
| 2026-02-08 12:00 |
17:12:06.07 |
-03:04:28.5 |
HIP 84116 |
17.01 |
| 2026-02-09 00:00 |
17:12:08.55 |
-03:04:01.2 |
HIP 84116 |
17.62 |
| 2026-02-09 12:00 |
17:12:10.99 |
-03:03:33.7 |
HIP 84116 |
18.24 |
| 2026-02-10 00:00 |
17:12:13.37 |
-03:03:05.9 |
HIP 84116 |
18.86 |
| 2026-02-10 12:00 |
17:12:15.70 |
-03:02:37.9 |
HIP 84116 |
19.50 |
| 2026-02-11 00:00 |
17:12:17.98 |
-03:02:09.7 |
HIP 84116 |
20.14 |
| 2026-02-11 12:00 |
17:12:20.21 |
-03:01:41.3 |
HIP 84116 |
20.79 |
| 2026-02-12 00:00 |
17:12:22.38 |
-03:01:12.6 |
HIP 84116 |
21.44 |
| 2026-02-12 12:00 |
17:12:24.50 |
-03:00:43.7 |
HIP 84116 |
22.09 |
| 2026-02-13 00:00 |
17:12:26.57 |
-03:00:14.7 |
HIP 84116 |
22.75 |
| 2026-02-13 12:00 |
17:12:28.59 |
-02:59:45.3 |
HIP 84116 |
23.40 |
| 2026-02-14 00:00 |
17:12:30.55 |
-02:59:15.8 |
HIP 84116 |
24.06 |
| 2026-02-14 12:00 |
17:12:32.46 |
-02:58:46.1 |
HIP 84116 |
24.71 |
| 2026-02-15 00:00 |
17:12:34.31 |
-02:58:16.1 |
HIP 84116 |
25.37 |
| 2026-02-15 12:00 |
17:12:36.11 |
-02:57:46.0 |
HIP 84116 |
26.02 |
| 2026-02-16 00:00 |
17:12:37.85 |
-02:57:15.6 |
HIP 84116 |
26.67 |
| 2026-02-16 12:00 |
17:12:39.54 |
-02:56:45.1 |
HIP 84116 |
27.31 |
| 2026-02-17 00:00 |
17:12:41.17 |
-02:56:14.3 |
HIP 84116 |
27.96 |
| 2026-02-17 12:00 |
17:12:42.75 |
-02:55:43.4 |
HIP 84116 |
28.60 |
| 2026-02-18 00:00 |
17:12:44.27 |
-02:55:12.2 |
HIP 84116 |
29.24 |
| 2026-02-18 12:00 |
17:12:45.74 |
-02:54:40.9 |
HIP 84116 |
29.87 |
| 2026-02-19 00:00 |
17:12:47.15 |
-02:54:09.3 |
HIP 84116 |
30.50 |
| 2026-02-19 12:00 |
17:12:48.50 |
-02:53:37.6 |
HIP 84116 |
31.13 |
| 2026-02-20 00:00 |
17:12:49.80 |
-02:53:05.7 |
HIP 84116 |
31.75 |
| 2026-02-20 12:00 |
17:12:51.04 |
-02:52:33.6 |
HIP 84116 |
32.37 |
| 2026-02-21 00:00 |
17:12:52.22 |
-02:52:01.3 |
HIP 84116 |
32.98 |
| 2026-02-21 12:00 |
17:12:53.34 |
-02:51:28.8 |
HIP 84116 |
33.59 |
| 2026-02-22 00:00 |
17:12:54.41 |
-02:50:56.2 |
HIP 84116 |
34.20 |
| 2026-02-22 12:00 |
17:12:55.42 |
-02:50:23.4 |
HIP 84211 |
34.38 |
| 2026-02-23 00:00 |
17:12:56.37 |
-02:49:50.4 |
HIP 84211 |
33.84 |
| 2026-02-23 12:00 |
17:12:57.27 |
-02:49:17.3 |
HIP 84211 |
33.30 |
| 2026-02-24 00:00 |
17:12:58.10 |
-02:48:43.9 |
HIP 84211 |
32.76 |