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) |
| 2026-05-12 00:00 |
19:31:38.30 |
-63:35:22.4 |
HIP 96385 |
28.55 |
| 2026-05-12 12:00 |
19:31:28.89 |
-63:37:00.6 |
HIP 96385 |
29.96 |
| 2026-05-13 00:00 |
19:31:19.29 |
-63:38:38.6 |
HIP 96385 |
31.45 |
| 2026-05-13 12:00 |
19:31:09.52 |
-63:40:16.3 |
HIP 96385 |
33.00 |
| 2026-05-14 00:00 |
19:30:59.56 |
-63:41:53.7 |
HIP 96385 |
34.61 |
| 2026-05-14 12:00 |
19:30:49.41 |
-63:43:30.7 |
HIP 96385 |
36.27 |
| 2026-05-15 00:00 |
19:30:39.09 |
-63:45:07.4 |
HIP 96385 |
37.97 |
| 2026-05-15 12:00 |
19:30:28.59 |
-63:46:43.7 |
HIP 96385 |
39.71 |
| 2026-05-16 00:00 |
19:30:17.91 |
-63:48:19.6 |
HIP 96385 |
41.48 |
| 2026-05-16 12:00 |
19:30:07.05 |
-63:49:55.2 |
HIP 96385 |
43.29 |
| 2026-05-17 00:00 |
19:29:56.01 |
-63:51:30.4 |
HIP 95571 |
44.55 |
| 2026-05-17 12:00 |
19:29:44.79 |
-63:53:05.2 |
HIP 95571 |
45.25 |
| 2026-05-18 00:00 |
19:29:33.40 |
-63:54:39.5 |
HIP 95571 |
46.02 |
| 2026-05-18 12:00 |
19:29:21.83 |
-63:56:13.5 |
HIP 95571 |
46.85 |
| 2026-05-19 00:00 |
19:29:10.08 |
-63:57:47.0 |
HIP 95571 |
47.74 |
| 2026-05-19 12:00 |
19:28:58.16 |
-63:59:20.1 |
HIP 95403 |
48.28 |
| 2026-05-20 00:00 |
19:28:46.07 |
-64:00:52.7 |
HIP 95403 |
48.67 |
| 2026-05-20 12:00 |
19:28:33.80 |
-64:02:24.9 |
HIP 95403 |
49.14 |
| 2026-05-21 00:00 |
19:28:21.36 |
-64:03:56.6 |
HIP 95123 |
49.47 |
| 2026-05-21 12:00 |
19:28:08.76 |
-64:05:27.8 |
HIP 95840 |
48.46 |
| 2026-05-22 00:00 |
19:27:55.98 |
-64:06:58.6 |
HIP 95840 |
47.25 |
| 2026-05-22 12:00 |
19:27:43.03 |
-64:08:28.8 |
HIP 95840 |
46.12 |
| 2026-05-23 00:00 |
19:27:29.91 |
-64:09:58.6 |
HIP 95840 |
45.07 |
| 2026-05-23 12:00 |
19:27:16.63 |
-64:11:27.8 |
HIP 95840 |
44.10 |
| 2026-05-24 00:00 |
19:27:03.18 |
-64:12:56.4 |
HIP 95840 |
43.22 |
| 2026-05-24 12:00 |
19:26:49.56 |
-64:14:24.6 |
HIP 95840 |
42.44 |
| 2026-05-25 00:00 |
19:26:35.79 |
-64:15:52.2 |
HIP 95840 |
41.76 |
| 2026-05-25 12:00 |
19:26:21.85 |
-64:17:19.2 |
HIP 95840 |
41.19 |
| 2026-05-26 00:00 |
19:26:07.74 |
-64:18:45.7 |
HIP 95840 |
40.74 |
| 2026-05-26 12:00 |
19:25:53.48 |
-64:20:11.6 |
HIP 95840 |
40.41 |
| 2026-05-27 00:00 |
19:25:39.06 |
-64:21:37.0 |
HIP 95840 |
40.19 |
| 2026-05-27 12:00 |
19:25:24.48 |
-64:23:01.7 |
HIP 95840 |
40.11 |
| 2026-05-28 00:00 |
19:25:09.74 |
-64:24:25.8 |
HIP 95840 |
40.15 |
| 2026-05-28 12:00 |
19:24:54.85 |
-64:25:49.3 |
HIP 95840 |
40.32 |
| 2026-05-29 00:00 |
19:24:39.80 |
-64:27:12.3 |
HIP 95840 |
40.62 |
| 2026-05-29 12:00 |
19:24:24.60 |
-64:28:34.5 |
HIP 95840 |
41.04 |
| 2026-05-30 00:00 |
19:24:09.24 |
-64:29:56.2 |
HIP 95840 |
41.59 |
| 2026-05-30 12:00 |
19:23:53.74 |
-64:31:17.2 |
HIP 95840 |
42.25 |
| 2026-05-31 00:00 |
19:23:38.08 |
-64:32:37.5 |
HIP 95567 |
42.83 |
| 2026-05-31 12:00 |
19:23:22.28 |
-64:33:57.2 |
HIP 95567 |
42.35 |
| 2026-06-01 00:00 |
19:23:06.33 |
-64:35:16.2 |
HIP 95567 |
41.98 |
| 2026-06-01 12:00 |
19:22:50.23 |
-64:36:34.5 |
HIP 95567 |
41.74 |
| 2026-06-02 00:00 |
19:22:33.99 |
-64:37:52.2 |
HIP 95567 |
41.62 |