메타데이터
| 항목 |
값 |
| Designation |
C/2023 B2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-03-10T11:54:03.790080Z |
| Orbit solution date (soln_date, UTC) |
2023-12-12T20:44:25Z |
| Obs used |
1107 |
| NEO |
- |
| M1 |
5.800 |
| K1 |
34.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-01-21T23:14:22.070400Z |
| Discovery magnitude (MPC) |
18.82 c |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-04-20.0000000 |
| e |
0.99712391 |
| q (au) |
1.743129 |
| a (au) |
606.075015 |
| i (deg) |
40.770763 |
| Ω (om, deg) |
218.120594 |
| ω (w, deg) |
317.399433 |
| M (ma, deg) |
0.002676 |
밝기
산란 + 전체 선형
$$
M_a = (13.836 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.836 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
| 2022-11-16 |
2023-03-09 |
+18.9790 |
-4.051 |
| 2023-03-11 |
2023-05-22 |
+44.4170 |
-11.509 |
| 2023-05-22 |
2023-07-17 |
-28.8936 |
+9.864 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
20:17:01.59 |
+20:16:23.9 |
HIP 99914 |
19.28 |
| 2026-03-26 12:00 |
20:17:08.57 |
+20:18:19.1 |
HIP 99914 |
18.60 |
| 2026-03-27 00:00 |
20:17:15.47 |
+20:20:14.6 |
HIP 99914 |
18.24 |
| 2026-03-27 12:00 |
20:17:22.28 |
+20:22:10.2 |
HIP 99914 |
18.19 |
| 2026-03-28 00:00 |
20:17:29.01 |
+20:24:06.1 |
HIP 99914 |
18.47 |
| 2026-03-28 12:00 |
20:17:35.66 |
+20:26:02.1 |
HIP 99914 |
19.06 |
| 2026-03-29 00:00 |
20:17:42.22 |
+20:27:58.3 |
HIP 100160 |
18.44 |
| 2026-03-29 12:00 |
20:17:48.69 |
+20:29:54.7 |
HIP 100160 |
17.05 |
| 2026-03-30 00:00 |
20:17:55.09 |
+20:31:51.3 |
HIP 100160 |
15.94 |
| 2026-03-30 12:00 |
20:18:01.39 |
+20:33:48.0 |
HIP 100160 |
15.16 |
| 2026-03-31 00:00 |
20:18:07.61 |
+20:35:44.9 |
HIP 100160 |
14.78 |
| 2026-03-31 12:00 |
20:18:13.75 |
+20:37:41.9 |
HIP 100160 |
14.80 |
| 2026-04-01 00:00 |
20:18:19.79 |
+20:39:39.0 |
HIP 100160 |
15.23 |
| 2026-04-01 12:00 |
20:18:25.75 |
+20:41:36.3 |
HIP 100160 |
16.03 |
| 2026-04-02 00:00 |
20:18:31.63 |
+20:43:33.8 |
HIP 100160 |
17.15 |
| 2026-04-02 12:00 |
20:18:37.42 |
+20:45:31.3 |
HIP 100160 |
18.51 |
| 2026-04-03 00:00 |
20:18:43.11 |
+20:47:29.0 |
HIP 100160 |
20.07 |
| 2026-04-03 12:00 |
20:18:48.73 |
+20:49:26.8 |
HIP 100160 |
21.79 |
| 2026-04-04 00:00 |
20:18:54.25 |
+20:51:24.7 |
HIP 100147 |
21.20 |
| 2026-04-04 12:00 |
20:18:59.68 |
+20:53:22.7 |
HIP 100147 |
19.31 |
| 2026-04-05 00:00 |
20:19:05.03 |
+20:55:20.8 |
HIP 100147 |
17.52 |
| 2026-04-05 12:00 |
20:19:10.29 |
+20:57:19.0 |
HIP 100147 |
15.87 |
| 2026-04-06 00:00 |
20:19:15.45 |
+20:59:17.3 |
HIP 100147 |
14.40 |
| 2026-04-06 12:00 |
20:19:20.53 |
+21:01:15.6 |
HIP 100147 |
13.15 |
| 2026-04-07 00:00 |
20:19:25.52 |
+21:03:14.0 |
HIP 100147 |
12.20 |
| 2026-04-07 12:00 |
20:19:30.41 |
+21:05:12.5 |
HIP 100147 |
11.61 |
| 2026-04-08 00:00 |
20:19:35.22 |
+21:07:11.1 |
HIP 100147 |
11.44 |
| 2026-04-08 12:00 |
20:19:39.94 |
+21:09:09.6 |
HIP 100147 |
11.69 |
| 2026-04-09 00:00 |
20:19:44.56 |
+21:11:08.3 |
HIP 100147 |
12.33 |
| 2026-04-09 12:00 |
20:19:49.09 |
+21:13:06.9 |
HIP 100147 |
13.31 |
| 2026-04-10 00:00 |
20:19:53.53 |
+21:15:05.6 |
HIP 100147 |
14.55 |
| 2026-04-10 12:00 |
20:19:57.88 |
+21:17:04.3 |
HIP 100147 |
15.98 |
| 2026-04-11 00:00 |
20:20:02.13 |
+21:19:03.0 |
HIP 100147 |
17.56 |
| 2026-04-11 12:00 |
20:20:06.29 |
+21:21:01.8 |
HIP 100346 |
16.22 |
| 2026-04-12 00:00 |
20:20:10.36 |
+21:23:00.5 |
HIP 100346 |
14.28 |
| 2026-04-12 12:00 |
20:20:14.34 |
+21:24:59.2 |
HIP 100346 |
12.45 |
| 2026-04-13 00:00 |
20:20:18.22 |
+21:26:57.9 |
HIP 100346 |
10.78 |
| 2026-04-13 12:00 |
20:20:22.01 |
+21:28:56.6 |
HIP 100346 |
9.33 |
| 2026-04-14 00:00 |
20:20:25.70 |
+21:30:55.3 |
HIP 100346 |
8.23 |
| 2026-04-14 12:00 |
20:20:29.30 |
+21:32:53.9 |
HIP 100346 |
7.62 |
| 2026-04-15 00:00 |
20:20:32.80 |
+21:34:52.4 |
HIP 100346 |
7.61 |
| 2026-04-15 12:00 |
20:20:36.21 |
+21:36:51.0 |
HIP 100346 |
8.19 |
| 2026-04-16 00:00 |
20:20:39.52 |
+21:38:49.4 |
HIP 100346 |
9.25 |