메타데이터
| 항목 |
값 |
| Designation |
C/2022 D2 (Kowalski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-03-27T13:51:54.040320Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:31Z |
| Obs used |
112 |
| NEO |
- |
| M1 |
14.100 |
| K1 |
25.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-02-25T02:54:45.244800Z |
| Discovery magnitude (MPC) |
19.85 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-03-11.0000000 |
| e |
0.99563301 |
| q (au) |
1.555140 |
| a (au) |
356.112305 |
| i (deg) |
22.654502 |
| Ω (om, deg) |
312.470402 |
| ω (w, deg) |
177.792237 |
| M (ma, deg) |
359.997569 |
밝기
산란 + 전체 선형
$$
M_a = (15.407 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.407 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-07-29 00:00 |
18:03:06.56 |
-39:12:07.1 |
HIP 88458 |
13.71 |
| 2026-07-29 12:00 |
18:02:58.60 |
-39:11:39.8 |
HIP 88458 |
14.87 |
| 2026-07-30 00:00 |
18:02:50.72 |
-39:11:12.3 |
HIP 88458 |
16.09 |
| 2026-07-30 12:00 |
18:02:42.90 |
-39:10:44.4 |
HIP 88458 |
17.37 |
| 2026-07-31 00:00 |
18:02:35.16 |
-39:10:16.4 |
HIP 88230 |
18.30 |
| 2026-07-31 12:00 |
18:02:27.49 |
-39:09:48.0 |
HIP 88230 |
16.75 |
| 2026-08-01 00:00 |
18:02:19.88 |
-39:09:19.5 |
HIP 88230 |
15.21 |
| 2026-08-01 12:00 |
18:02:12.35 |
-39:08:50.7 |
HIP 88230 |
13.69 |
| 2026-08-02 00:00 |
18:02:04.90 |
-39:08:21.6 |
HIP 88230 |
12.18 |
| 2026-08-02 12:00 |
18:01:57.51 |
-39:07:52.3 |
HIP 88230 |
10.69 |
| 2026-08-03 00:00 |
18:01:50.21 |
-39:07:22.8 |
HIP 88230 |
9.22 |
| 2026-08-03 12:00 |
18:01:42.97 |
-39:06:53.0 |
HIP 88230 |
7.78 |
| 2026-08-04 00:00 |
18:01:35.81 |
-39:06:23.0 |
HIP 88230 |
6.37 |
| 2026-08-04 12:00 |
18:01:28.73 |
-39:05:52.8 |
HIP 88230 |
5.02 |
| 2026-08-05 00:00 |
18:01:21.72 |
-39:05:22.4 |
HIP 88230 |
3.76 |
| 2026-08-05 12:00 |
18:01:14.79 |
-39:04:51.7 |
HIP 88230 |
2.73 |
| 2026-08-06 00:00 |
18:01:07.93 |
-39:04:20.9 |
HIP 88230 |
2.21 |
| 2026-08-06 12:00 |
18:01:01.16 |
-39:03:49.8 |
HIP 88230 |
2.54 |
| 2026-08-07 00:00 |
18:00:54.46 |
-39:03:18.5 |
HIP 88230 |
3.45 |
| 2026-08-07 12:00 |
18:00:47.84 |
-39:02:47.0 |
HIP 88230 |
4.61 |
| 2026-08-08 00:00 |
18:00:41.31 |
-39:02:15.3 |
HIP 88230 |
5.86 |
| 2026-08-08 12:00 |
18:00:34.85 |
-39:01:43.4 |
HIP 88230 |
7.15 |
| 2026-08-09 00:00 |
18:00:28.47 |
-39:01:11.3 |
HIP 88230 |
8.45 |
| 2026-08-09 12:00 |
18:00:22.17 |
-39:00:39.0 |
HIP 88230 |
9.75 |
| 2026-08-10 00:00 |
18:00:15.96 |
-39:00:06.5 |
HIP 88230 |
11.05 |
| 2026-08-10 12:00 |
18:00:09.83 |
-38:59:33.8 |
HIP 88230 |
12.35 |
| 2026-08-11 00:00 |
18:00:03.78 |
-38:59:00.9 |
HIP 88230 |
13.63 |
| 2026-08-11 12:00 |
17:59:57.82 |
-38:58:27.9 |
HIP 88230 |
14.90 |
| 2026-08-12 00:00 |
17:59:51.94 |
-38:57:54.7 |
HIP 88176 |
15.80 |
| 2026-08-12 12:00 |
17:59:46.14 |
-38:57:21.3 |
HIP 88176 |
15.87 |
| 2026-08-13 00:00 |
17:59:40.43 |
-38:56:47.7 |
HIP 88176 |
16.03 |
| 2026-08-13 12:00 |
17:59:34.81 |
-38:56:14.0 |
HIP 88176 |
16.27 |
| 2026-08-14 00:00 |
17:59:29.27 |
-38:55:40.1 |
HIP 88176 |
16.58 |
| 2026-08-14 12:00 |
17:59:23.81 |
-38:55:06.1 |
HIP 88176 |
16.96 |
| 2026-08-15 00:00 |
17:59:18.45 |
-38:54:31.8 |
HIP 88176 |
17.40 |
| 2026-08-15 12:00 |
17:59:13.17 |
-38:53:57.5 |
HIP 88176 |
17.90 |
| 2026-08-16 00:00 |
17:59:07.98 |
-38:53:23.0 |
HIP 88176 |
18.44 |
| 2026-08-16 12:00 |
17:59:02.87 |
-38:52:48.3 |
HIP 88063 |
18.46 |
| 2026-08-17 00:00 |
17:58:57.86 |
-38:52:13.5 |
HIP 88063 |
17.99 |
| 2026-08-17 12:00 |
17:58:52.93 |
-38:51:38.6 |
HIP 88063 |
17.58 |
| 2026-08-18 00:00 |
17:58:48.09 |
-38:51:03.5 |
HIP 87904 |
17.02 |
| 2026-08-18 12:00 |
17:58:43.34 |
-38:50:28.3 |
HIP 87904 |
16.25 |
| 2026-08-19 00:00 |
17:58:38.68 |
-38:49:53.0 |
HIP 87904 |
15.54 |