C/2022 R2 (ATLAS)
메타데이터
| 항목 |
값 |
| Designation |
C/2022 R2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-10-25T05:16:07.564800Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:12Z |
| Obs used |
295 |
| NEO |
- |
| M1 |
16.600 |
| K1 |
16.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-14T14:22:04.569600Z |
| Discovery magnitude (MPC) |
17.63 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-09-29.0000000 |
| e |
0.99850301 |
| q (au) |
0.632587 |
| a (au) |
422.571115 |
| i (deg) |
52.894812 |
| Ω (om, deg) |
60.403612 |
| ω (w, deg) |
78.376566 |
| M (ma, deg) |
359.997025 |
밝기
산란 + 전체 선형
$$
M_a = (15.906 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.906 |
| n |
6.000 |
| 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 |
| 2022-09-06 |
2022-09-18 |
-9.2857 |
+0.236 |
| 2022-09-18 |
2022-10-04 |
+15.1692 |
+0.457 |
| 2022-10-04 |
2022-10-22 |
-10.7635 |
-2.029 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
19:10:32.33 |
-59:10:12.2 |
HIP 94047 |
16.38 |
| 2026-02-03 12:00 |
19:10:50.24 |
-59:10:48.7 |
HIP 94047 |
17.95 |
| 2026-02-04 00:00 |
19:11:08.09 |
-59:11:25.8 |
HIP 94047 |
19.67 |
| 2026-02-04 12:00 |
19:11:25.87 |
-59:12:03.5 |
HIP 94379 |
19.99 |
| 2026-02-05 00:00 |
19:11:43.59 |
-59:12:41.7 |
HIP 94379 |
19.69 |
| 2026-02-05 12:00 |
19:12:01.23 |
-59:13:20.5 |
HIP 94379 |
19.68 |
| 2026-02-06 00:00 |
19:12:18.82 |
-59:13:59.8 |
HIP 94379 |
19.96 |
| 2026-02-06 12:00 |
19:12:36.33 |
-59:14:39.8 |
HIP 94379 |
20.53 |
| 2026-02-07 00:00 |
19:12:53.77 |
-59:15:20.3 |
HIP 94379 |
21.34 |
| 2026-02-07 12:00 |
19:13:11.15 |
-59:16:01.4 |
HIP 94602 |
20.81 |
| 2026-02-08 00:00 |
19:13:28.45 |
-59:16:43.0 |
HIP 94602 |
19.82 |
| 2026-02-08 12:00 |
19:13:45.68 |
-59:17:25.3 |
HIP 94602 |
19.09 |
| 2026-02-09 00:00 |
19:14:02.84 |
-59:18:08.1 |
HIP 94602 |
18.63 |
| 2026-02-09 12:00 |
19:14:19.92 |
-59:18:51.5 |
HIP 94602 |
18.46 |
| 2026-02-10 00:00 |
19:14:36.93 |
-59:19:35.4 |
HIP 94602 |
18.59 |
| 2026-02-10 12:00 |
19:14:53.87 |
-59:20:19.9 |
HIP 94602 |
19.01 |
| 2026-02-11 00:00 |
19:15:10.72 |
-59:21:05.0 |
HIP 94602 |
19.70 |
| 2026-02-11 12:00 |
19:15:27.51 |
-59:21:50.7 |
HIP 94602 |
20.62 |
| 2026-02-12 00:00 |
19:15:44.21 |
-59:22:37.0 |
HIP 94602 |
21.76 |
| 2026-02-12 12:00 |
19:16:00.83 |
-59:23:23.8 |
HIP 94602 |
23.07 |
| 2026-02-13 00:00 |
19:16:17.38 |
-59:24:11.2 |
HIP 94602 |
24.53 |
| 2026-02-13 12:00 |
19:16:33.84 |
-59:24:59.1 |
HIP 94602 |
26.10 |
| 2026-02-14 00:00 |
19:16:50.22 |
-59:25:47.7 |
HIP 94602 |
27.77 |
| 2026-02-14 12:00 |
19:17:06.52 |
-59:26:36.8 |
HIP 95065 |
28.83 |
| 2026-02-15 00:00 |
19:17:22.74 |
-59:27:26.5 |
HIP 95065 |
26.61 |
| 2026-02-15 12:00 |
19:17:38.87 |
-59:28:16.7 |
HIP 95065 |
24.40 |
| 2026-02-16 00:00 |
19:17:54.92 |
-59:29:07.6 |
HIP 95065 |
22.20 |
| 2026-02-16 12:00 |
19:18:10.88 |
-59:29:59.0 |
HIP 95065 |
20.01 |
| 2026-02-17 00:00 |
19:18:26.75 |
-59:30:50.9 |
HIP 95065 |
17.82 |
| 2026-02-17 12:00 |
19:18:42.53 |
-59:31:43.5 |
HIP 95065 |
15.64 |
| 2026-02-18 00:00 |
19:18:58.23 |
-59:32:36.6 |
HIP 95065 |
13.46 |
| 2026-02-18 12:00 |
19:19:13.83 |
-59:33:30.2 |
HIP 95065 |
11.30 |
| 2026-02-19 00:00 |
19:19:29.34 |
-59:34:24.5 |
HIP 95065 |
9.14 |
| 2026-02-19 12:00 |
19:19:44.76 |
-59:35:19.3 |
HIP 95065 |
6.99 |
| 2026-02-20 00:00 |
19:20:00.09 |
-59:36:14.7 |
HIP 95065 |
4.85 |
| 2026-02-20 12:00 |
19:20:15.33 |
-59:37:10.6 |
HIP 95065 |
2.73 |
| 2026-02-21 00:00 |
19:20:30.47 |
-59:38:07.1 |
HIP 95065 |
0.75 |
| 2026-02-21 12:00 |
19:20:45.51 |
-59:39:04.1 |
HIP 95065 |
1.64 |
| 2026-02-22 00:00 |
19:21:00.46 |
-59:40:01.8 |
HIP 95065 |
3.72 |
| 2026-02-22 12:00 |
19:21:15.31 |
-59:41:00.0 |
HIP 95065 |
5.81 |
| 2026-02-23 00:00 |
19:21:30.06 |
-59:41:58.7 |
HIP 95065 |
7.91 |
| 2026-02-23 12:00 |
19:21:44.71 |
-59:42:57.9 |
HIP 95065 |
10.00 |
| 2026-02-24 00:00 |
19:21:59.27 |
-59:43:57.8 |
HIP 95065 |
12.08 |