메타데이터
| 항목 |
값 |
| Designation |
422P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-05-27T22:01:25.478400Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:21Z |
| Obs used |
281 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
18.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2021-06-05T07:45:40.032000Z |
| Discovery magnitude (MPC) |
18.60 R |
| Discovery observatory (MPC) |
Y00 · SONEAR Observatory, Oliveira |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-12-16.0000000 |
| e |
0.50606921 |
| q (au) |
3.092805 |
| a (au) |
6.261616 |
| i (deg) |
39.588451 |
| Ω (om, deg) |
36.088366 |
| ω (w, deg) |
305.989857 |
| M (ma, deg) |
173.555768 |
밝기
산란 + 전체 선형
$$
M_a = (7.906 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.906 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-06-05 |
2022-11-29 |
+36.3090 |
-19.481 |
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 |
08:53:14.34 |
+57:27:25.4 |
HIP 43707 |
12.52 |
| 2026-05-12 12:00 |
08:53:25.79 |
+57:24:48.2 |
HIP 43707 |
9.48 |
| 2026-05-13 00:00 |
08:53:37.40 |
+57:22:11.0 |
HIP 43707 |
6.43 |
| 2026-05-13 12:00 |
08:53:49.17 |
+57:19:33.8 |
HIP 43707 |
3.38 |
| 2026-05-14 00:00 |
08:54:01.11 |
+57:16:56.7 |
HIP 43707 |
0.41 |
| 2026-05-14 12:00 |
08:54:13.21 |
+57:14:19.6 |
HIP 43707 |
2.81 |
| 2026-05-15 00:00 |
08:54:25.47 |
+57:11:42.6 |
HIP 43707 |
5.90 |
| 2026-05-15 12:00 |
08:54:37.89 |
+57:09:05.7 |
HIP 43707 |
9.01 |
| 2026-05-16 00:00 |
08:54:50.46 |
+57:06:28.8 |
HIP 43707 |
12.13 |
| 2026-05-16 12:00 |
08:55:03.19 |
+57:03:52.0 |
HIP 43707 |
15.26 |
| 2026-05-17 00:00 |
08:55:16.08 |
+57:01:15.3 |
HIP 43933 |
15.87 |
| 2026-05-17 12:00 |
08:55:29.12 |
+56:58:38.7 |
HIP 43933 |
13.10 |
| 2026-05-18 00:00 |
08:55:42.31 |
+56:56:02.2 |
HIP 43933 |
10.54 |
| 2026-05-18 12:00 |
08:55:55.65 |
+56:53:25.8 |
HIP 43933 |
8.37 |
| 2026-05-19 00:00 |
08:56:09.14 |
+56:50:49.5 |
HIP 43933 |
7.00 |
| 2026-05-19 12:00 |
08:56:22.78 |
+56:48:13.3 |
HIP 43933 |
6.93 |
| 2026-05-20 00:00 |
08:56:36.56 |
+56:45:37.2 |
HIP 43933 |
8.20 |
| 2026-05-20 12:00 |
08:56:50.49 |
+56:43:01.2 |
HIP 43884 |
6.83 |
| 2026-05-21 00:00 |
08:57:04.56 |
+56:40:25.4 |
HIP 43884 |
6.38 |
| 2026-05-21 12:00 |
08:57:18.78 |
+56:37:49.7 |
HIP 43884 |
7.48 |
| 2026-05-22 00:00 |
08:57:33.13 |
+56:35:14.2 |
HIP 43884 |
9.64 |
| 2026-05-22 12:00 |
08:57:47.62 |
+56:32:38.8 |
HIP 43884 |
12.31 |
| 2026-05-23 00:00 |
08:58:02.25 |
+56:30:03.5 |
HIP 43884 |
15.23 |
| 2026-05-23 12:00 |
08:58:17.02 |
+56:27:28.5 |
HIP 44223 |
18.08 |
| 2026-05-24 00:00 |
08:58:31.92 |
+56:24:53.5 |
HIP 44223 |
16.44 |
| 2026-05-24 12:00 |
08:58:46.96 |
+56:22:18.8 |
HIP 44223 |
15.32 |
| 2026-05-25 00:00 |
08:59:02.12 |
+56:19:44.2 |
HIP 44223 |
14.85 |
| 2026-05-25 12:00 |
08:59:17.42 |
+56:17:09.7 |
HIP 44223 |
15.09 |
| 2026-05-26 00:00 |
08:59:32.85 |
+56:14:35.5 |
HIP 44223 |
16.03 |
| 2026-05-26 12:00 |
08:59:48.41 |
+56:12:01.4 |
HIP 44223 |
17.55 |
| 2026-05-27 00:00 |
09:00:04.09 |
+56:09:27.5 |
HIP 44223 |
19.53 |
| 2026-05-27 12:00 |
09:00:19.90 |
+56:06:53.8 |
HIP 44289 |
16.91 |
| 2026-05-28 00:00 |
09:00:35.83 |
+56:04:20.3 |
HIP 44289 |
13.68 |
| 2026-05-28 12:00 |
09:00:51.89 |
+56:01:47.0 |
HIP 44289 |
10.55 |
| 2026-05-29 00:00 |
09:01:08.06 |
+55:59:13.9 |
HIP 44289 |
7.65 |
| 2026-05-29 12:00 |
09:01:24.36 |
+55:56:41.0 |
HIP 44289 |
5.40 |
| 2026-05-30 00:00 |
09:01:40.78 |
+55:54:08.3 |
HIP 44289 |
4.84 |
| 2026-05-30 12:00 |
09:01:57.32 |
+55:51:35.8 |
HIP 44289 |
6.44 |
| 2026-05-31 00:00 |
09:02:13.97 |
+55:49:03.5 |
HIP 44289 |
9.14 |
| 2026-05-31 12:00 |
09:02:30.74 |
+55:46:31.5 |
HIP 44289 |
12.24 |
| 2026-06-01 00:00 |
09:02:47.63 |
+55:43:59.6 |
HIP 44289 |
15.51 |
| 2026-06-01 12:00 |
09:03:04.63 |
+55:41:28.0 |
HIP 44289 |
18.87 |
| 2026-06-02 00:00 |
09:03:21.74 |
+55:38:56.6 |
HIP 44638 |
21.63 |