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 |
-0.501 |
| 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) |
| 2026-07-29 00:00 |
09:44:03.23 |
+51:28:52.2 |
HIP 47635 |
17.78 |
| 2026-07-29 12:00 |
09:44:27.02 |
+51:27:06.7 |
HIP 47635 |
19.50 |
| 2026-07-30 00:00 |
09:44:50.83 |
+51:25:21.7 |
HIP 47635 |
21.88 |
| 2026-07-30 12:00 |
09:45:14.65 |
+51:23:37.3 |
HIP 47635 |
24.72 |
| 2026-07-31 00:00 |
09:45:38.47 |
+51:21:53.5 |
HIP 47635 |
27.89 |
| 2026-07-31 12:00 |
09:46:02.31 |
+51:20:10.2 |
HIP 48041 |
27.20 |
| 2026-08-01 00:00 |
09:46:26.16 |
+51:18:27.5 |
HIP 48041 |
23.84 |
| 2026-08-01 12:00 |
09:46:50.02 |
+51:16:45.4 |
HIP 48041 |
20.77 |
| 2026-08-02 00:00 |
09:47:13.89 |
+51:15:03.8 |
HIP 48041 |
18.11 |
| 2026-08-02 12:00 |
09:47:37.77 |
+51:13:22.8 |
HIP 48041 |
16.09 |
| 2026-08-03 00:00 |
09:48:01.65 |
+51:11:42.4 |
HIP 48041 |
14.97 |
| 2026-08-03 12:00 |
09:48:25.54 |
+51:10:02.5 |
HIP 48041 |
14.93 |
| 2026-08-04 00:00 |
09:48:49.44 |
+51:08:23.3 |
HIP 48041 |
16.00 |
| 2026-08-04 12:00 |
09:49:13.35 |
+51:06:44.6 |
HIP 48041 |
17.98 |
| 2026-08-05 00:00 |
09:49:37.26 |
+51:05:06.6 |
HIP 48242 |
20.04 |
| 2026-08-05 12:00 |
09:50:01.17 |
+51:03:29.1 |
HIP 48270 |
20.86 |
| 2026-08-06 00:00 |
09:50:25.09 |
+51:01:52.2 |
HIP 48270 |
18.78 |
| 2026-08-06 12:00 |
09:50:49.02 |
+51:00:15.9 |
HIP 48270 |
17.43 |
| 2026-08-07 00:00 |
09:51:12.95 |
+50:58:40.3 |
HIP 48270 |
17.01 |
| 2026-08-07 12:00 |
09:51:36.88 |
+50:57:05.2 |
HIP 48270 |
17.57 |
| 2026-08-08 00:00 |
09:52:00.81 |
+50:55:30.8 |
HIP 48509 |
18.05 |
| 2026-08-08 12:00 |
09:52:24.74 |
+50:53:56.9 |
HIP 48509 |
14.09 |
| 2026-08-09 00:00 |
09:52:48.68 |
+50:52:23.7 |
HIP 48509 |
10.25 |
| 2026-08-09 12:00 |
09:53:12.61 |
+50:50:51.1 |
HIP 48509 |
6.70 |
| 2026-08-10 00:00 |
09:53:36.55 |
+50:49:19.2 |
HIP 48509 |
4.28 |
| 2026-08-10 12:00 |
09:54:00.48 |
+50:47:47.9 |
HIP 48509 |
5.00 |
| 2026-08-11 00:00 |
09:54:24.41 |
+50:46:17.2 |
HIP 48509 |
8.06 |
| 2026-08-11 12:00 |
09:54:48.34 |
+50:44:47.1 |
HIP 48509 |
11.76 |
| 2026-08-12 00:00 |
09:55:12.27 |
+50:43:17.7 |
HIP 48548 |
15.57 |
| 2026-08-12 12:00 |
09:55:36.19 |
+50:41:49.0 |
HIP 48548 |
17.48 |
| 2026-08-13 00:00 |
09:56:00.10 |
+50:40:20.9 |
HIP 48548 |
20.05 |
| 2026-08-13 12:00 |
09:56:24.01 |
+50:38:53.4 |
HIP 48548 |
23.07 |
| 2026-08-14 00:00 |
09:56:47.92 |
+50:37:26.6 |
HIP 48548 |
26.37 |
| 2026-08-14 12:00 |
09:57:11.82 |
+50:36:00.5 |
HIP 48954 |
29.79 |
| 2026-08-15 00:00 |
09:57:35.71 |
+50:34:35.0 |
HIP 49040 |
26.19 |
| 2026-08-15 12:00 |
09:57:59.59 |
+50:33:10.3 |
HIP 49040 |
22.62 |
| 2026-08-16 00:00 |
09:58:23.46 |
+50:31:46.1 |
HIP 49040 |
19.23 |
| 2026-08-16 12:00 |
09:58:47.32 |
+50:30:22.7 |
HIP 49040 |
16.15 |
| 2026-08-17 00:00 |
09:59:11.17 |
+50:29:00.0 |
HIP 49040 |
13.56 |
| 2026-08-17 12:00 |
09:59:35.01 |
+50:27:37.9 |
HIP 49040 |
11.80 |
| 2026-08-18 00:00 |
09:59:58.84 |
+50:26:16.5 |
HIP 49040 |
11.25 |
| 2026-08-18 12:00 |
10:00:22.66 |
+50:24:55.8 |
HIP 49040 |
12.09 |
| 2026-08-19 00:00 |
10:00:46.46 |
+50:23:35.8 |
HIP 49150 |
11.66 |